Best of luck on your journey!
If you really want to earn money at gambling, you must ditch the Blackjack at online casinos. Playing a hand of blackjack has negative expected value (ie if you place infinite bets you will lose it all). There is no way that you can structure negative EV bets (using martingale strategies or others) so that they become positive EV. It is impossible, if you want to earn money at gambling you must stop playing blackjack online. Any book that advocates martingale strategies is giving you terrible advice.
You can definitely count at live casinos, but it is very tough now. Floors are very well trained to spot it and you will get banned quickly from the major properties. Now the best time to count is when casinos are super busy that the floors can't stop the counters (ie New Year's Eve, March Madness, the night of big fights in vegas, etc). Also you would want to work on a team, but you should have capital in the 200k+ range. Just to be clear, even with counting you are chasing a VERY SMALL EV and the is VERY HIGH variance. Many of the former counters that I know now play poker exclusively. Given your bankroll, I think it is better to stick with poker.
Poker on the other hand, can be very profitable. Especially the bitcoin poker rooms that are full of inexperienced players. But if you want to excel at poker it takes hard work, study, and patience. You must learn the game and be able to withstand the winds of variance. I am pretty sure you know this, but just reiterating.
Also you should consider signing up with me as a referral (PeterB) at Seals with Clubs, by far the best Bitcoin poker room (in terms of players and action):
https://sealswithclubs.eu/aff.php?aff=297If you sign up with me I can help you out with good eBooks, articles and other resources. Anyone else interested in gambling / poker should also feel free to PM me.
Run good!