Sharing your audiogram would help us understand your needs for molds.
There are a few ways mold impressions can be made. Some people do better with open mouth, some with closed mouth and then there are the ones with a clinched mouth or chewing while impressions are setting up.
When you do get comfortable molds they can be very nice and comfortable with better than domes performance. Properly fit molds can be a touch uncomfortable the first few days until you get used to them.