First things first, if you want to learn more about making money through self-publishing, join the Facebook group 20BooksTo50K.
Your homework for the next month is to just join the group, and observe the posts that will inevitably pop up in your feed. If you want to fast track your knowledge, scroll through the group's feed and read the posts. Then go to the group's documents and check those out. There's a goldmine of information there.
If you don't have a Facebook profile, I'm sorry, but you need one. Like, absolutely need one. You don't have to post things, or even interact for now (thought you definitely will need to do those things eventually) but you need a profile just to join the 20BooksTo50K group.
It's totally worth it. Trust me.