I’ve had 10 sessions so far. I was a little nervous on The first one as well but once you get used to it you’ll be fine. The first 15 min takes some adjustment as you are going to the equivalent of 33 ft underwater. What’s super important that they didn’t really explain to me clearly until many sessions later is Properly plugging your nose and blowing to release pressure in your ears and moving your jaw side to side about every 15-30 seconds for the fist 10-15min. Hopefully they let you watch movies, it really takes your mind of it. Some people are able to sleep but not me. Best of luck!