I'm getting into diving getting ready to take a class actually. But due to my size I figured I would get my own gear rather than hoping the rental gear fits. I realize I'm going to need a custom made wet suit, but the big problem is most of the normal bcd's I have looked at are too small. I've looking at the backplate systems with airwing bc. I think this would be easier to tailor to my size. Any input would be greatly appreciated.
I started down this road a few years ago, like yourself, and I'll only post this, just to provide a little motivation about how diving can influence and effect your life. Because I think hope is a very powerful motivator.
I started at first w/ 2 custom wetsuits, a 3mm and a 7mm... a Scuba Pro XXL BC w/ a Cummerbund extension, and then into a custom drysuit when I caught the bug up in cold water.
If I did it again; I would have started w/ a backplate & wing setup, as it was size independent... you can always cut off excess webbing or easily replace it when worn, in addition, if you have ANY desire to get into deeper, and or technical diving, you'll be going that route eventually... So why go through iterations of gear?
I think you'll find diving to be a very freeing experience. You'll want to take things easy, as others have mentioned for cardiovascular reasons, but compared to other physical activities, its liberating to have the weight not trudge you down. air consumption will get better with practice and exercise.
For me, it was the motivation to step away; from the keyboard, tv, bar and go out and live life... Hope it has the same impact on you...
-Tim