It depends what you mean. Started consistently making a profit on individual games, or have made a net profit over all the money you've ever put into poker? I started playing 4 months ago at the beginning of April. Since then I started out reading and practicing very intensively. I started moving up stakes on play money, then started doing micro stakes as well as play money about 2 months ago. I picked up a lot of information playing with real money
but in reality ended up losing on a steady basis. It's only in the past few weeks am I almost back at the deposit I started with, so I am making it back but slowly and cautiously. I'd consider myself an extremely cautious player, so I'm considering this as a winning streak rather than having conquered the micro stakes.
Funnily enough I think the hardest skill to acquire is not picking up winning tactics, but eliminating silly mistakes. The worst is when you make one and immediately recognise the mistake. It's as if you knew that by doing it, it'd be foolish, and you plan beforehand not to do that kind of mistake, but it still slips through anyway. So when I first started I wasn't sure why it'd take so long to learn poker, but I think it's the infinite amount of possible scenarios that present themselves, that can confuse you. It's as if they're hiding in plain sight. Anyway I've gone off on a tangent. Good luck with your progress.