I'm working on a project of mine and I just realized that I don't even know how to upload a RenPy game onto here. Just to clarify, I don't know where to find my own code files for a project in the folder, and I'm not even sure what to do after I do find the file. If anyone can help, that would be amazing! Thank you!

You have to export / publish the game from Ren'Py. It will create one or more archives for you, depending on the options you choose. You'll be able to pick where, too.

How do you want it to export? There are many ways like PC, html and android.