Richeson is right. The body work is the greatest challenge and takes most of the time. The actual act of painting is the fun part.
Trucker: Yes, I painted the interior too but I did so long ago with lacquer. That was a mistake. Gotta sand and repaint.
Being at the whim of every little rain shower ain't no fun. If you have access to a garage, that's the way to go, but you CAN do a nice job in the yard if necessary.