Hi, I'm currently playing Spin & Gold on GGPoker and I can say it is good, but I think it is harder than most part of people think...
The profit depends on how good you are at the game, but if you consider yourself a true beginner, I would recommend you to choose between cash game (if you want something more flexible and with less variables (as tournaments, that has ICM, for example) and Sit & Go, because it is a small version of the classic tournaments, and you can apply everything you are learning about tournaments easily.
Both are really good, but you need to study a lot, as all game types, obviously...