Remember to put your divesuit on right. I have two of them. One zippes in the front and one in the back. I usually wear the one that zippes in the front so when I decided to wear the one that zippes in the back I put it on backwards... geeezzzz I looked and felt pretty silly
Remember to depressurize the hoses before trying to remove the regs from your tank or it makes a loud popping sound... dumb story behind that one too!
Always make sure your air is on before jumping into the water oh.. and remember to put the regs in your mouth.. i started to submerged and realized I had forgotten to put the regs in my mouth.. water didn’t taste very good..lol