I don’t even know if there’s a resource to teach you how to do that. I don’t even remember how I learned, reckon there were others being patient with me.
1. Create a GitHub account. It allows you to make your own repositories (basically individual project areas for code)
2. With your account, you’ll be able to fork their project. What that means is that you’ll get a 1:1 copy of the project that was shared at that time, and you can proceed to make changes to the code
3. have a program that can edit and compile code. I use Visual Studio (I think 2019?) for free. Use it for making my mini programs or plugins
Let’s get that all done before we jump to next steps