You might want to take a look at the tutorial videos, plenty of examples of how to draw lines, arcs, all that good stuff.
Asking someone to tutor you in a forum is a bit much, yanno? We love to help someone if they have a particular issue, more general stuff like you are asking has already been addressed in the videos. Hopefully someone will come along who has a couple of good vids to point you at.
"If you see a good fight, get in it." Dr. Vernon Jones