All I do is open the sink faucets and purge the air from the tank and water lines (cold and hot side). The hot side will take longer since you've got more air in the heater tank. With the water pump, it'll shut off automatically when the valves are all clear of air and the faucets are closed. Using city pressure, there isn't anything else to do.
As far as the valves are concerned, make sure they're both turned the same way and verify that the tank has water in it after purging the air by opening the pressure relief valve on the outside. If no water or pressure, turn both valves and try again. You'll probably hear the water filling the tank and have to purge it again. Then verify water's in the tank again. Once you've got water, fire up the heater and you're in business. Never run the water heater without water in the tank. It'll ruin the water heater.
Good luck! Welcome to the group!
2016 Jay Feather X19H
1999 Chevy Silverado 1500 4x4