B2B is an ocean swim, correct? That adds another degree of uncertainty, of course, but not an insurmountable one.

Your swim background sounds a lot like mine, so a little experience will go a long way towards your comfort. Oh, and I wouldn't worry too much about the wetsuit - if it fits you well, it actually makes the swimming easier. You'll want to test it out in the water before you race just to know how it feels, but I don't think you'll need to do a tri in one to 'get it'.

The other thing you could do is to register for one of those earlier tri's and if you can't get V to run for you in a relay, you could just walk the run or skip it altogether.

Oh, also check if there are any tri shops or clubs in you area that do any starter clinics. Some here do OW group swims and smaller 'practice' triathlons to help beginners get experience.