OP....given how little you know about wheels, spokes, hubs, flanges, etc., do yourself a favor....get the wheels built professionally with new spokes and safe (sic) yourself
That's what I've always done; take my bike in and let the professionals do it. This hub replacement will be the first work I've done on my own bike, but not the last.
I think I'll be more satisfied with the job after taking the time to learn how to do it properly. And I've become less and less satisfied with my bike shop over time.