My advice would be to relax and stay calm. If you can complete the drills at 6ft, you can do it at 30. Also, take time during your decent to avoid problems equalizing. If you are experiencing a problem, there is no shame in halting your activity for a safety or comfort issue. Once you are underwater, there is no value in rushing. Take your time, think before you act and enjoy the view. Finally, the best piece of advice I can offer is to have fun. Diving is a release from stress and with proper training, it can be quite therapeutic and life changing. GOOD LUCK!