its all up to you. I'm sorry to hear you haven't found the right fit yet. It may turn out no class suits you and maybe another game is more your style. Or you may wind up loving tanking. it all depends on you. and there's only one way to find out.

HOWEVER you will have a much easier time leveling with a tank due to the ability to spam dungeons and that insta que. so no need to go through potd again.