Inspecting the belt isn't reliable. It'll look good almost up until it breaks.

Many people replace waterpump at the same time so you don't have to do the whole job over again.

Crankshaft pulley is probably the most difficult thing. Get the crank-holding tool or use a really powerful air impact wrench.

Check & understand the timing marks before you take off the old belt. Most likely something will move, so you can't count on JUST slipping the new belt on.