Your first build will probably be serviceable but not stellar. It's not hard but it's not trivial either. Your second build will probably still be in just the 'okay' category. By your 10th wheel you'll start to get the hang of it.

I'd suggest getting an old wheel, take it apart, relace and rebuild, and then take it for a short spin. Take it home and do it again...maybe even a couple of times. Then try a new wheel with new components. The old wheel will give you a feel for what you need to do before you risk expensive stuff