If you want to use the game engine made with monogame called protogame, you should post your questions here: About Protogame
Not everyone here works with this engine, more likely each dev here makes its own game engine for the purpose of its game
If you want to make a game as fast as possible it may not be the best choice, monogame is lower level than ue4 and unity but more likely to learn something with monogame in development/coding