Theres lots of really good advice above. But frankly with the number of dives you have done OP my advise at the moment is RELAX.
I'm reluctant to say forget the advice given because it is all pretty darn good Bbut frankly I feel you will give yourself the very best improvement by just chilling out slowing down and forget everything for awhile.I honestly feel that at your stage you almost need to be half asleep.
BUT --all that said. Just how "bad" is it? What sized tank are you using and how long are you underwater for?
it has occurred to me that your freinds might be super easy on gas.
If you get about 45 minute dives then Ii would say you don't have a lot to worry about
I'm reluctant to say forget the advice given because it is all pretty darn good Bbut frankly I feel you will give yourself the very best improvement by just chilling out slowing down and forget everything for awhile.I honestly feel that at your stage you almost need to be half asleep.
BUT --all that said. Just how "bad" is it? What sized tank are you using and how long are you underwater for?
it has occurred to me that your freinds might be super easy on gas.
If you get about 45 minute dives then Ii would say you don't have a lot to worry about