Anyone know of a really clear tutorial on how to create a new S3 bucket along with IAM credentials that can be used to read and write from that bucket?

I want to build some software that lets people store their own data in their own S3 bucket, but if possible I'd like not to have to teach people the incantations needed to get their bucket setup and minimum-permission credentials figures out

Bonus if they don't have to install any software on their own computer

This one looks great! Detailed screenshots of all of the many different steps (why is this so hard!?) https://twitter.com/wsv3000/status/1249049606111068161?s=21 https://twitter.com/wsv3000/status/1249049606111068161