I see tyvm for this info I think it's best for me to not try anything before learning python.To create a .rpy file you first need to enable file extensions in your os.
If you are on windows, it's like this
Otherwise I'm sure you can find how to do it with a quick internet search.You don't have permission to view the spoiler content. Log in or register now.
Then just create a text file and change the .txt to . rpy
I don't know exactly what you are planing to do but you will probably need some knowledge about coding in python, otherwise you will either make something that doesn't do anything or create a buggy mess.
Also to make or edit .rpy files I would suggest using notepad++ or something similar rather than the basic notepad app.
PS : you can use unren to decompile .rpa and .rpyc files to get the .rpy files.
The only "coding" experience I had with renpy was me just unlocking full gallery with
#if not renpy.seen_image(i):
# return True
So i thought eh shurley if I just edit the text on some event that had bad English / or make poorly done incest mod because people have been asking and since it's original creator hasn't updated and it would be just coding experience shurley I wouldn't break anything.
But I think this is too advance stuff for me at least for now.