Definitely interested in seeing what you make. Indentation definitely takes a while to get used to, that and colons, haha. There's a lot of tutorials you can find about specific stuff you want to do, and stuff in the documentation as well. If you haven't seen these yet, here's a couple of links to get you started:
GUI https://www.renpy.org/doc/html/gui.html
using random integers https://www.renpy.org/doc/html/other.html?highlight=random#renpy-random