thats simple, take a drill or an impact wrench, get the correct size socket and attact it to the shaft that drives the oil pump from the top side of the engine (be careful! don't drop any parts down there) turn turn turn, it'll prime itself, it doesn't hurt to fill the pickup with a little oil while your putting it together either
yes the engine should pick up oil on its own when you start it,... but.. you really want it to have pressure way before the amount of time it takes to prime