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Free training - skill primer

Learn Cloud fundamentals for free

A free, source-cited path to learning the core cloud concepts, practiced with no-account pricing calculators on your own machine — this is a learning path, not a certification and not a job guarantee. Cloud concepts stick when you model real usage, not when you memorize definitions.

What it is

Cloud fundamentals is the platform-independent understanding of how cloud computing works — the shared vocabulary and mental models that carry across AWS, Azure, Google Cloud, and any other provider. Rather than 'how do I click through one console', it is 'what is actually being sold, who is responsible for what, and how does cost relate to usage'. Because the concepts are common across providers, this is a highly transferable foundation: the same ideas underpin cloud-engineering, cloud-support, DevOps, and solutions-architecture work regardless of which platform an employer runs. You can learn all of it for free, and you can make the economics concrete without ever creating an account or spending anything.

The core concepts form a compact set. The shared-responsibility model: the provider secures and operates the underlying infrastructure while the customer remains responsible for their own data, access, and configuration — and exactly where that line falls shifts depending on the service. Service models: Infrastructure as a Service (IaaS, you manage the OS and up), Platform as a Service (PaaS, you manage just your app), and Software as a Service (SaaS, you just use the software). Deployment models: public, private, and hybrid. Scaling and elasticity: adding or removing capacity as demand changes, so you are not stuck sizing for a peak that rarely comes. Resilience: designing so that a single failure does not take everything down. Consumption and pricing: pay-as-you-go economics, where cost tracks usage instead of a fixed up-front purchase. Together these explain why organizations adopt cloud and how the trade-offs work.

The concept that surprises newcomers most is the pricing model, and it is also the easiest to make tangible: because cloud is consumption-based, you can use each provider's free, no-account pricing calculator to model a small workload and literally watch the estimated cost rise and fall as you change the size and hours. That turns abstract words like 'elasticity' and 'pay-as-you-go' into numbers, with no account, no card, and no spend. This primer sequences the three major providers' free concept courses and gives you a first hands-on exercise using the pricing calculators only.

Why it matters

Cloud fundamentals is the shared foundation beneath cloud-engineering, cloud-support, DevOps, and solutions-architecture roles, because shared responsibility, service models, and consumption pricing shape nearly every decision on any platform. The concepts transfer across AWS, Azure, and Google Cloud, so the foundation compounds rather than locking you to a single provider.

The free path, in order

  1. Learn the shared-responsibility model. Understand where the provider's responsibility ends and yours begins, and how that line moves between IaaS, PaaS, and SaaS. Microsoft Learn's free AZ-900 cloud-concepts path and AWS's free Cloud Practitioner Essentials both cover this clearly.
  2. Distinguish the service models: IaaS, PaaS, SaaS. Learn what you manage versus what the provider manages at each level, with concrete examples of each. This is the single most-used framework for reasoning about any cloud service.
  3. Understand deployment models and resilience. Learn public, private, and hybrid deployments, and how designing across multiple availability zones/regions provides resilience so one failure does not take everything down.
  4. Grasp scaling, elasticity, and consumption pricing. Learn how capacity scales with demand and how pay-as-you-go pricing means cost tracks usage. Google Cloud's free intro/skills-boost cloud-concepts content reinforces these across a third provider's vocabulary.
  5. Make the economics concrete (no account). Use the free Azure and AWS pricing calculators to model a small workload and watch estimated cost change as you adjust size and hours — turning 'elasticity' and 'pay-as-you-go' into numbers with no account and no spend.

Best free resources

Every resource is free and dated. Official sources are labeled; vetted community resources are labeled separately. Verify a resource is still free on its own page before relying on it.

Try it (free, safe, hands-on)

Model a workload and watch cost scale with usage

Use the free, no-account cloud pricing calculators to model a small workload and observe how estimated cost changes as you adjust size and hours — turning pay-as-you-go and elasticity into real numbers, with no account and no spend.

You will need: Your own computer with a web browser; The Azure Pricing Calculator (free, no account required); The AWS Pricing Calculator (free, no account required); A text file to record your estimates

  1. Open the Azure Pricing Calculator in your browser. Add a single virtual machine, pick a small size and a region, and note the estimated monthly cost. No account or sign-in is needed to build an estimate.
  2. Change the number of hours the VM runs (for example from 730 hours/month down to 200) and watch the estimate drop — this is pay-as-you-go: you are billed for what you use, not a fixed purchase.
  3. Increase the VM size (more CPU/RAM) and note how the estimate rises. Then imagine 'scaling out' by adding a second VM and see the cost roughly double — a concrete view of elasticity's cost side.
  4. Open the AWS Pricing Calculator and model a comparable small compute instance, then compare the shape of the two estimates. Note that the concepts (size x hours = cost) are the same even though the provider and names differ.
  5. Write a short note: how did cost change with hours, with size, and with instance count? Restate 'elasticity' and 'pay-as-you-go' in your own words using the numbers you just produced.

What you should see: Two provider cost estimates you built with no account and no spend, showing estimated cost rising and falling as you change size, hours, and instance count — a concrete, numeric demonstration of consumption pricing and elasticity that matches the concepts across both platforms.

Safety: This exercise uses only free public pricing calculators in your own browser — no account, no credit card, and no resources are ever created, so there is nothing to spend and nothing to shut down. Everything runs on your own machine; you are only building estimates, not provisioning anything.

Where this skill gets used

Certifications that test it: microsoft-az-900, aws-certified-cloud-practitioner, microsoft-az-104, aws-solutions-architect-associate, comptia-tech-plus.

Roles that need it: Cloud engineer, Cloud support associate, DevOps engineer, Solutions architect.

Sources

Every resource is free and dated; official-first, community clearly labeled. A skill primer is a free learning path, not a certification, not professional experience, and not a job or salary promise. Labs use only free, no-account pricing calculators in your own browser — no account, no spend, nothing provisioned. Born draft, pending human review.

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