Probably your best best is to read the AMA thread posted by other bitcointalk members.
- [AMA] The Life of a Professional Gambler

Initially, reading it encouraged me to learn how to play poker and place bets on sporting events. However, because of the heavy workload I'm under at school for technical stuff, I've since realized that sports betting isn't really my thing. Fortunately, reading the post has inspired me to consider the profession temporarily especially that your question is pretty common for people looking at a gambling career.