Hey, sorry for not replying! It's very easy for messages to get buried on Itch so I tend to miss anything too far down. A more reliable way to get in touch with me is on Discord :)
As for recommendations on where to start, I'm not sure if I'm the best person to ask as I'm entirely self-taught and my method was to download a bunch of free SDK (software development kits, for example Ren'py, Unreal Engine, Godot, etc.) and spend a few days playing around with each one, and going on YouTube for tutorials.
Once I found one that I liked and I thought I could make a game with (in this case Ren'py) I made a couple little prototypes to familiarize myself with the systems I'd need to make CK.
That done, I jumped into making CK. I expected to only have a dozen players, which would have given me a lot of leeway to experiment and make mistakes, but, well, it didn't really work out that way... :P
Anyway, that's an extremely truncated version of my method. If you'd like to know more about it, send me a DM on Discord or catch one of my livestreams - I'm always happy to go into my process in realtime when asked :)