Crawfishing

I thought this whole time it was called "loberstering" but was corrected as I purchased my fishing license. Now this I haven't done but I am looking forward to mini-season which begins at the end of the month. I've been briefed on what I need to do. Take a deep breath, dive a few feet, tickle the lobster and lead it to my bag while making sure there is no fish bigger than me or a sting ray or any other thing that would scare the living begeezers out of me as I slowly release air and make sure to have enough to come back up. Geez that sounds tiring to me. I am a bit fearful of the ocean especially after my boyfriend caught a black-tipped shark and then expected me to go diving after I witnessed the whole ordeal. What crazy person does that?! Me. I dove in 15 feet deep water (minutes after the shark thrashed and released itself from the galf in its mouth). This was a bit scary at first, I kept looking out for the shark even though I knew we were no longer at 100 feet plus depth and were actually where we caught our bait. I felt pretty comfortable and think I'll be able to tickle and catch. The idea of surf and turf is my motivation. Do you have any advice for a first time "crawfisher?" I want to be most effective while not getting stung or eaten.