Gamedev question. Where to begin?

Question

Android

I want to write a game, or a program, I don’t know what to call it, in which several users are asked the same questions, and as a result, display the one who won. I'm a beginner, I can write a platformer or some other little thing, but I don't know how several smartphones will be connected, where to store data (who answered what, who played with whom). before that I wrote with Libgdx, can I write on it? and just do where to start?

Answer 1

before that I wrote with Libgdx, can I write on it?

No problem. Only network interaction on something else will have to be written.
Either p2p or through a server. The second option will suit you better. From here it follows what skills you need.

Answer 2

Start by compiling the TOR, otherwise it’s not even clear under which platform you want to write it.