Sorry about my question, I know that this is a stupid one. I want to begin in game dev, where should I start? Should I start with libGDX, Love2D or with Monogame. I know how to program in this languages (JAVA, LUA and C #). I just wnat an opinion from those who have more expirience than I. Please, help me. Thank you
I'm afraid the answer to questions like these is "It depends."
There are several factors you'll want to consider:
In full disclaimer, my experience has primarily been with libGDX and Unity, with a smattering of SFML.
Learning to create games becomes a lot easier if you already know how to program, but only if you know the language you're writing the game in. For example, I'm most knowledgeable with Java, and while C# is similar in many regards, I still lose a lot of time in Unity to understanding the quirks of the language.
Honestly, this is becoming less and less of an issue as more interpreted languages are supported on more platforms. It is worth noting that some frameworks make it easier to be cross-platform than others. For example, libGDX provides a tool which generates all the Android/iOS/HTML template code for you when you create your project.
The more complex your game is (in terms of computation, graphics, physics, etc.), the more sophisticated a game engine you require. Conversely, the simpler your game, the more those shiny game engine features are going to get in the way. Another hint here is to look at what published indie game developers have used (Bastion is a good game that was written in MonoGame, so you know it works).
Especially when you're getting started, community is important. You need a bunch of friendly people who can help answer your questions or look at your buggy code with you. Rather than try to find a way to measure involvement, let me give you an example of some things to look for:
Hopefully this helps- there are dozens of other game engines out there (many of which might fit your needs better than these three), but we'll need more details to go on in order to give a good recommendation.