I understand what you mean, I am a fresh developer but I am working in 4.2 so some of the things in 3 don't translate at all in syntax or in functions which is what I'm having problems with. I'm trying to understand the var, func and syntax changes so I'm basically learning two game engines at once.
I really want to use the beatmap for 4.2 since I believe it'll be pretty much crucial for game dev in rhythm games, I'm just having a hard time translating the information gathered from the JSON and slapping it into my own code if that makes sense.