poker is about making money. Before playing really high you want to play with worse players. For begginers I would advice party poker. More rakeback, softer site than pokerstars. Pokerstars can be really aggro sometimes and begginer player can easily bust his rolls there. Too many aggro donks.
I would recommend watch more videos or read booka to learn about poker. YouTube has a lot of great resources such as tournament reviews, tutorials for you to learn