@wilko your approach is spot on. There is no need to rush the initial face of building your bankroll. I originally started my journey with a $1000 bankroll. The start was slow, but money was being made. After a couple of months the bankroll starts to have a massive snowball effect and you really start making some room to play with.
Start with clearing those deposit bonuses like you are doing, then once you feel comfortable with the process/have enough bankroll to try some of the stuff in our elite course then do so. I would suggest playing around with some sports promotions in the near future.
No need to rush this stuff. Take your time and the results will come.
Keep up the good work mate