It really heartbreaking to see you putting in all this effort and not getting the result you would expect. The amount work that you are putting in is really commendable and thats the reason so many want to see you succeed.
Every one who has gone thru’ this process knows that the only thing that will work in your case is a consistent effort in working on fundamentals.
Looks like you are able to draw boxes perspective (using the line tool). The next step (if you are only interested in drawing people) would be draw figures using these boxes (use the line tool if you wish… as that is how you practiced). Draw a 20 of these figures and post them here and let the community critique it.
Remember create figures only using boxes (eg. an arm would be stretched/elongated box, head would be another box, no curved lines). Do not put in any details or worry about anything else other than the perspective and the shape of the box. You do this for a while and I guanrantee you that your efforts will reap you rewards in the FASTEST manner possible.