This is how I drew 10 years after art school:
I didn't knew anything about drawing. Teacher didn't told us how to see, they just told us how to draw proportions.
This is now
I still need to improve, I can't draw right from my mind (Lately the only thing I draw from mind are hands, just because I'm too lazy to find photo references. And anyway I look to my hands), but, 99% of things I know about drawing was learn in those last 5 years.