I myself, posted 1 (maybe 2) many of these and become more confused when I was told to use the search box (which I didn't) oops.
The basic answer I got is 'JUST DRAW' ( 'oh hell he said it') but the truth is
I found the real teacher is me, each mistake I make is something learned that wont happen in the next piece,
because my last drawing is teaching me how to approach
the next one,in essence teaching MYSELF and everything drawn that actually worked, is a new weapon in my arsenal
practising making a library in my head and hand.
I found that like learning to hit a target
with a ball, knowing the trajectory and physics of it will improve knowledge, but I can hit a target by just
throwing it till it hits the bullseye repeatability without being a scientist.
I would like to mention another issue of depression and health problems even disorders such as ADD.
I know that the suffering artist is a well known stereotype such as Van Gogh but its definitely not a prerequisite for the creation
of art and if it is: Well then I am off to go BANG my head against the WALL and see if I improve.
Some may thrive with it artistically but I am not one of them, so I myself took my own advice and seen a doctor but finally I CAN CONCENTRATE NOW.
And since I watched every tutorial( and I spent $ and crap loads of time doin it ) in the past and was misguided by how easy GREAT
artists make it look, such as thinking 'its just a box' or 'the highlight goes here' and 'the stick man isn't even drawn right'.
When actually putting pen to paper and seeing that my lines weren't smooth and my box was out of perspective and combining
shapes is quite hard, not to mention the fact that my gesture work was the basis for how dynamic my end figure would look.
Putting pen to paper was the answer all along. So now 'I JUST DRAW' nothing worth posting, just sketches on top of sketches
I even grab a bigger pen and go over top of that, and it 'FEELS GREAT'
EDIT: reduced size of rambling
EDIT: was sermon like I agree , tried from my perspective to read a little better, had to remove the part that vineris addressed, but atleast its in this thread.