Welcome and to use that often used phrase "Thank you for your service" -- and continued service - We need good solid people like you in the service.
You are taking the absolutely correct route -- master the art of the snorkel, concurrently learn all about the ocean and its many quirks. When you do take up the bubble machine your waterman ship will be well above the norm
There is no need to hurry the ocean or a mid west mud puddle will be around for a long long time
If in any way I can be of assistance drop an PM on me
Good luck,'
Sam Miller,III
(Captain USAF- Korean war)