If you start with a top-down raglan pattern, you don't have to seam!
I always hated my finished products because of my poor seaming, but when I learned the proper techniques it was easier and things looked so, so much better. So don't be afraid of it. There are simple techniques that get you through it the right way.
So find a pattern that you like. Most sweaters are constructed very similarly, so give it a shot.
A good way to start is with a child's sweater. The construction is the same, there's less knitting, and the recipient isn't as fussy.
is a good place to look.