>>5794728from there, i think you can/should do two things:
1) pick things you want to know how to draw and draw them. cars? hands? people hugging? machines?
2) supplement fundies. learn some perspective, or seek out starting anatomy, learn rendering, etc etc. you'll hit all these topics bit by bit, and circle back around to them as you learn.
It takes time, and the more you draw the better you'll get.
Getting to the skill in the initial pic will take a while. The answer depends on how much work you put in, how well you learn, past experiences, and what you draw.