You have the inlet pipe left hand side of the filter, outlet pipe the right side, (PS you dont need to remove these to change the filter,) the important one is just behind the filter and is the return to tank pipe normally with a green fitting, Unclip the red clips which are 2 parts first one comes up the other part goes down. you may need to use a small screwdrive to gentle spread the end to get thgese apart, fit a pipe to the green end and suck fuel out until it runs without a lot of air in it re connect the ends and now start the engine a bring the revs up to 2000 - 2500 for a minute, this sould clear any more air in the system. Job done.
My mate changed his fuel filter on hia astra and did not bleed it, so he called out his breakdown firm, who just sprayed easy starty in it until it bleed its self, not what i would have done but it worked for him.