Erick, welcome back to diving. . . It's a shame diving lost you for so long. It is good that you've picked out a local dive store to start up again. If you'll work to meet the divers from this and any other dive shops, you have a better chance of remaining an active diver. Use new dive classes to learn skills your dive buddies already have, but rely on meeting the divers you can share dives with to remain active. If your buddies dive dry suits, you should too. If your buddies want to dive deep, you should prepare your training and experience to learn this. The classes won't help you keep diving. . . they will let you keep up with the dive partners that will keep you interested.