I have a billion projects that i want to host online. Does anyone have a good tutorial for hosting python projects, flask based web-apps, and just simple websites using aws or some other hosting service?

You can get a VPS for like $5 and use it as the host. It's pretty much just a Linux VM somewhere in a data center.

With that many projects I feel like you should look into containers (Docker might be the easiest to start with). You will probably also want to use a reverse proxy, like Nginx Proxy Manager. Reddit r/selfhosted should have enough info to get you started

At least AWS has pretty decent user guides and tutorials on how to do smth like that on their platform. I’m pretty sure a quick search would also result in tons of tutorials…

That should mean in the order of magnitude of one clock cycle per project per second on contemporary CPUs, so you might want to look into building a datacenter.