Fact is, the wealthier you are, the easier it is to play BJ and the poorer you are, the more dangerous it is to your mental and physical well being. If you are a wealthy guy, you can lose $5 max bets of $100 at a $10 min. Table and $2000 in a session and it does not affect you, If you have another job that pays the bills and a $10k Bankroll, a session like that will cause a great deal of pain, lead to balking at placing larger bets and second thoughts of whether counting cards works. If you don't have a Bankroll, take $300 to a local casino, you will lose it, draw more from an ATM and go home having lost far more than you can afford.

So, the first question is whether you can afford to consider BJ as a career, and second, whether you have the Bankroll to even play the $10 tables and the the RD is to learn about what sorts of negative swings can you expect and the means to survive it.