For a newbe,and the factory rocker system, put them in empty but oiled, and make sure they spin freely, in the lifter bores.
Then when you preoil, you park the cam in the correct two spots and fill the rocker shafts until all the rockers are oiling. By the time that is done, all the lifters will have the right amount of oil in them.
After that you can park the crank at TDC #1 compression, and install the oilpump drive shaft. Then Back the crank up to the 20* advance mark and drop the Distributor in. Then prefit the rotor and cap and index the #1 tower, install the wires,and she's almost ready to fire.