Instance Types Plainly
By the end you can read an instance name aloud and say what each part means, ask AWS itself what a type is, say what x86_64 and arm64 mean for a client's software, measure the machine you rented instead of guessing, read every line of its bill on the provider's own page with the page and the date beside it, set Lightsail beside EC2, check an AI tool's comparison number by number, and write one page for a real client that says what to rent, why not bigger and why not smaller, then leave the instance stopped for SCS2b.5's teardown.