How to create a fully functioning website

So I am a complete novice to Web Development, but have wanted to get into it for a while now and wanted to do this by coding a fully functioning website. I have taken a class last semester on PHP/SQL and I have some knowledge of how to use these, but I have only used them in relation to my school server.

If I want to be able to create an actual website with database functionality to store things like usernames and passwords and such, how would I do this now that I no longer have access to my university server?

I have already started coding, and currently just have a bunch of PHP files...How would I be able to make these into a website that I could publish?