You will need lead or plastic expander plugs to insert into the holes in the ceiling. It is easier if you only need one hook per bike and let it hang down. That way the spacing between the wheels is of no concern. But if there in no clearance to allow the bike to hang that low, you have to hang it by both wheels. I like the one hook method the best.

If you have studs in the walls and space there, you can screw in the hooks high up on the wall protruding horizontally. Once again either on hook with the bike hanging down or two. Some folks put the bike perpendicular to the wall as if it were riding down it with one hook through the rear wheel high up on the wall.

Lots of ways to do it.