I have just started diving with a Scubapro Nova Scotia semi-dry suit.
Right now my major issue with this suit is that air bubbles can get trapped inside while I am dressing. I have tried to bend on my knees and squeeze the suite from my ankles to my neck but I was not very successful. I could not sink. My buddy and I decided to let water inside it, which, obviously made me feel colder straightaway, but at least I was able to stay underwater. However during the dive my buoyancy was all over the place until, it seemed to me, I reached a depth of about 60 feet, where it was easier to control it.
Any tips on how I can release this air in a more efficient way?
Land is a losing proposition. Instead, once you're in the water, floating on the surface, go vertical for a moment and pull open the neck seal. The water pressure pushing in against your body should force the air out. Just do your best not to let water in.