Originally Posted by
Pars
Park Tool probably has info on how to do, as well as Sheldon Brown's site. I always used to do the cups with a block of wood and a hammer back in the '70s/'80s, just make sure they are straight and not cocked and go slowly. Probably not the best advice now. You can make your own headset press with a long bolt and some big fender washers and a nut. Same for the crown race set; a piece of thick wall 1" PVC tubing and a cap, just make sure the ends are square.
^ This
Bike maintenance is not rocket science and almost anyone can do it if they're keen enough. If they're not, that's OK, that's what the LBS is for.