Congratulation first, it is the right choice if you are searching for a hobby what brings you to the max and offers that much of adrenalin kicked moments with it's full potential to relax and enjoy.
Hope that was not to much but I was wrack diving to an 130 year Old wrack in Switzerland on the weekend. Wicked!
Just a quick note, try try try.... You will need probably your time before you find the right Buddy... And instructor.
All the best for this and I joy it with every breath.
Best regards
Nicolas