Option 1:
You might try putting the filter into the kitchen sink.
Directing the water from the faucet into the INTAKE tube. Kind of put your fist around the faucet and the intake tube to kind of link them together.
With the faucet on turn the filter on.
Once it is primed and you have most of the air out you can unplug the filter, set it up on the tank, and plug it in. Keeping your thumb over one of the tubes will keep the water from spilling out as you move the filter.
If it doesn't start flowing on the tank the priming handle may be of a little use.
Option 2:
Put a 5 gallon bucket on the floor.
Put the return line into the 5 gallon bucket.
Give the return line a good suck.
Plug the filter in.
Run the filter until the bucket is about half full.
Put the return line into the tank.
Poor the ~2gal or water back into your tank.
After a while you will begin to appreciate the finer points of the taste of fish tank water.
There are many other techniques to accomplish this same thing.
I thought I was the only one that harbored such fond feelings for my equipment.
Once the filter is going it will do a good job for you!