Poker is a tough business, there are very few where you can be dead right in your assumption of a situation and still come up short 20% of the time, and it be expected to have those results. Don't lose sight of the fact it is gambling, and screwy improbable things abound, and a healthy perspective on the game for what it is and you will do fine. I play a lot, write a bunch, read a ton and have dreams about this game, I'm pretty well obsessed but can still in the end say that it is one aspect of my life. To lose track that it is a game, even when it is your living to play this game is dangerous to your mental well being. I'm not writing from in-experience, I'm currently playing low stakes cash games full time on a shorter roll than I would like and am considering a dumb part-time job that is less than my hourly rate in order to keep from having to touch my roll for a couple of months. I hate the idea of 7.50/hr or some joke like that, but love the idea of a steady check coming from something besides the game.
I don't think I could stand the idea of low stakes tournaments as a source of income, so often in those games I find myself playing for two hours and change to break even, you are more brave than I. I pretty much consider tournaments a novelty, something that I play sometimes on cash game winnings, and only when there is some sort of overlay being offered. Cash games are the dinner of most people I know playing full time with tournaments being dessert. I know I can't live on cake alone
Stars is one of the toughest sites online opponent wise. They do have the best tournament structure that I've played although I like Absolutes a lot too. If you are a MTT fiend, prima has a lot of prize pool added low buy in freeze out and rebuy games with an OK structure. Often times the top prize on a $20 game is can be near 2k or over depending on the prize pool added and rarely are you playing a field over 300 players, where at stars the cheap games have 1k+ opponents frequently. The average opponent is worse than Stars as well and the list of MTT players to watch out for can be counted on two hands, with only one hand being really tough.
Didn't mean to ramble so much or come off as negative, I'm wishing you the best of luck, just thought I would share my perspective on low stakes games and cheap poker for a living.