I've started drawing on 21st December 2013. Since that day I draw everyday for about 1.5 hours per day and so far I did not skip a single day.
I do not take any art classes and study art completely on my own. However, it seems that the Internet becomes one of the best teachers nowadays with all these books/videos/tutorials/galleries/etc. available around the net, so I guess it should be more than enough.
The main question I'll try to find the answer to: is it possible to become a good artist starting from the absolute zero and without a specific education, and how long would it take? The Internet says, "yep, it is possible, somewhere between 3 and 5 years". Okay, I hope it's true.
All my drawings