my advice to you as a starting player: dont withdraw any $ from your online BR unless you absolutely have to. starting out, $100/$200/etc is pretty essential to your bankroll, and if your playing 25nl, thats 5-10 buyins. keep the money online, continue to move up in stakes, then start cashing out when the money is meaningful (1/2 NL+).
here is a good link from SSNL:
bankroll management