>>1535
I think one thing I'd try to address is that you seem to not really "work" with your drawing. You draw a thing and then just move on to the next and you never really go back and correct what's there. There are many ways to draw but one way I'd really recommend is to put down a few lines that capture the big impression, then you spend time to correct them until they seem to be accurate relative to each other. So you don't just move on as soon as you've drawn something, you spend time working with what you have. So spend time checking, are all the angles correct, are the points/corners in the correct relative position to each other? Don't expect yourself to draw everything perfectly in one go. Allow yourself to continually correct things.
I made a quick example of this. One from the reference you used and another from memory/imagination. Using as few lines as possible, just focusing on keeping it simple, capturing the fundamental impression, form and proportion of what I want to draw. Make sure to take extra care to compare angles of lines and angles between points on the body/drawing. Now these drawings aren't amazing but they show the idea and if I were to continue with this, I probably wouldn't add any more lines for a while, instead just tweak the lines I have to make it more accurate.
You can also use this as a base for other ways of drawing. If you wand a drawing that's more about form, you can then on top of this draw with more sweeping lines around the form to get that effect. You can also instead choose to continue this process of drawing and end up with something where each little angle and form has been very carefully studied and articulated. There's a lot of potential when you have set up a good base for yourself to work from.
I'd recommend Harold Speed's book The Practice and Science of Drawing if you want to get deeper into this way of drawing. Project gutenberg has a great html conversion of the book.