I find that a simple 7mm works okay for a 30 minute dive. I had to add layers when my dives started approaching an hour.
A DM or a local is a good idea. I'd be real careful about the conditions that I went in with the plan to don the gear in the water. If you're overweighted it could get dangerous fast, and there's a decent chance that you'll drop your rig in the surf. If you're worried about your injuries, it might be better to pass. I'd think your toes will hurt much more when they're cold, and I'd be more concerned about the exit than the entry.
The aquarium is very, very good though. Definitely go there either way. Maybe before you dive so you can get an idea of what you're seeing.
A DM or a local is a good idea. I'd be real careful about the conditions that I went in with the plan to don the gear in the water. If you're overweighted it could get dangerous fast, and there's a decent chance that you'll drop your rig in the surf. If you're worried about your injuries, it might be better to pass. I'd think your toes will hurt much more when they're cold, and I'd be more concerned about the exit than the entry.
The aquarium is very, very good though. Definitely go there either way. Maybe before you dive so you can get an idea of what you're seeing.