Assuming you turned off the fuel line valve to the filters before starting, I put an 18" length of clear tubing (aquarium air hose works fine) on the nipple on the bleed valve after I put the correct box wrench on the bleed valve in a position to allow as much turn as is allowed without having to reposition the wrench. I then tape a clear bottle to the wall or bulkhead or anything stationary close by and put the hose in the bottle. One hand on the wrench and the other pumping. Bottle can't get away or tip. Open valve as far as the wrench will allow and pump to prime. You will be able to see when there is a good flow. Since a small amount of air will leak back in around the bleed valve threads, on the last 3 or 4 strokes I pump, close valve before letting plunger up, open valve with pressure in the primer, close and repeat till no more air is seen.
My manual says to NOT fill filter before installing since this fuel being put in the filter bowl is not filtered. I can fill the primary and secondary filter at the same time this way also, since there is not a bleeder or primer on the primary. Probably 20 strokes to fill both. Using the correct box wrench makes it much less likely you will round off the shoulders on the bleed valve. Some prime pumps are a little different, but the principal is the same.
(Learned the hard way that if you forget to turn on the fuel valve from the tank after changing filters then no method works. LOL!)
I am also a believer in putting a thin film of grease on the gasket before screwing on the filter.