Estimated delivery time: when I learn to draw.
Join the club. *Shot*
Seriously though, take it from me, you never do really learn how to draw. You might think you know but then you realise that you don't and you facepalm at being proud of your old works, and then you work towards becoming better, and you become proud of those works, and you think that now you're good, but then you realise yet again that you've actually been doing it wrong, feel shame towards being proud of your old works, and the cycle continues, until you realise that you'll never stop learning, no matter how good you are. And so eventually you just think of everything as a learning experience because in reality you never have nor ever will know what the hell it is you're doing. And there's probably something that comes after that, but I haven't gotten to that point yet. :P
TL;DR version is that you never actually learn to draw.
I'm sorry if that made no sense, I'm feeling pretty weird right now.