Down -25% in your first 2 years isn't that bad..
With a 60% success rate, you apparently have a working method. The key is risk management and hanging on to your profits until your system makes you get out. You shouldn't have any losers on your trade log that will be large enough to hurt your account size.
So, ideally you would have around 45% small losers, 45% small winners and 10% huge winners. The small losers and winners would negate each other and leave you net profitable.
As for time frame, it'll depend on how disciplined the trader is and how soon they develop a set system with risk control. Some people never get it , some may take a couple of months. Desire to continue learning and reading is always good.