That is impossible to say. I was at a slight loss after a month… in the middle of my first month I was down about 50% of my bankroll (and yes… I had “tinkered” with the default settings…) but RB’s profit guarantee really helped out since I got the next month for free.
I have friends, and I know members, who have doubled their BR in a month…
How much you make also depends on how much time and effort you put into the betting. It is hugely important to put down lots of bets. With Kelly at 25% you will require even more bets to get the bankroll into play.
Read the article that I linked before and make sure you understand the different BR strategies!
This post is also good and touches on some of the strategies in the article.
https://community.rebelbetting.com/t/new-user-updating-bankroll-to-minimize-variance/11176/5?u=totrashbin01