[Anonymous]

if you can do that without killing yourself then yes i am serious

Basically I am really just trying to say... start really simple. Don't underestimate the AWESOME POWER of knowing how to draw a realistic square,circle, and triangles. Because that is how you should relaly draw everything else. Sort of like sculpting. That's how you get objects to appear to have mass.
And shading should come after mastery of line. If something doesn't look right with just lines (and already appear to have mass), don't bothering trying to shade it.