Originally Posted by BogdanStark
1. What limit better to start: 2NL,5, or 10 ?
Depends. How good are you? Are you already comfortably beating any of these stakes? Are you planning on playing 6-max or full ring?
The best course of action is usually starting at the lowest stakes. NL2 in this case.
2. What BR I need to feel comfortable?
If you have a good edge, 20 BIs is enough (which would be 40$). If you're unsure where you stand, you may want to start with at least 50 BIs (100$).
Bankroll management is going to be very important! Make sure that, if you move up, you are sufficiently rolled for the new stakes, and if things go bad that you drop down again!!!
Personally, I play with 50 BIs for NL2 (100$), and when I reach 120$, I take a shot at NL5. If I drop below 100$ again, I go back to NL2. If I reach 290$, I take a shot at NL10 (dropping back down to NL5 when dropping below 250$).
When taking shots at a higher stake, it might be interesting to start the shot-taking on the weekend (for a softer field of opponents). That gives you a bigger chance of starting off decent and being able to stay at those stakes.
Pick a BRM system that works for you, and if you're a winning player, you should be playing indefinitely.