You really need to start using spoilers... the Thread is getting too heavy with all those images loading at the same time...
About the drawings, a good thing to always do is to see other people drawings and try to understand what was the process to make them (youtube drawing videos are also good) ...then, you apply that with your drawings (only mentally understanding is never enough).
Another magical thing to do (that I have a difficult time doing myself .-. ) is to draw everyday for at least a hour.
You would be surprised with what you can get by following this simple steps..
Btw, before any of that, watch this video:
Don't mind much about the light/dark lines, but more on the continuous lines that he shows. Start to get confidence in your lines is the 1st major step in my opinion
It's always good to warm up before drawing (something around 10/20 min. ). It will increase you line confidence and allow you to make better drawings. This is a good video to start it up: