Honestly it sounds like your hopeless but I'll give it a shot. Quit worrying about how much profit you can expect. Results can vary widely day to day even for good players and I would bet a fair sum that you don't qualify for that description. Focus on playing well and the profits will come.
As for bankroll management, you might try Chris Ferguson's system. Chris is a scumbag but his system works. Here is a link to an article about it.
Also here is a link to a free tool that will do the math for you and let you apply the system without having to do math on your own.
These tools will work for you but only if you use them. No article, piece of software, or anything else can help you if you insist on doing self destructive things and you won't find a shoulder to cry on here if you insist on playing 100 NL with your whole bankroll.