I make my living programming, but I've never had any formal training -- programming used to just be a hobby as well. I learn the best by digging into what other

I make my living programming, but I've never had any formal training -- programming used to just be a hobby as well. I learn the best by digging into what other people have done and seeing how they did it. So I'd suggest taking a look at the GitHub repo for this project and set up your own instance of it. Learn how to install and configure the dependencies. Then make a few small changes that forces you to learn how the code works.