Welcome to the bay area..if you are learning to stay on your board? I would stay away from the Delta...if you get a 4/3 wetsuit you should be warm enough to enjoy "Alameda" and it is a much safer place to hone your skills. "Big Sandy Beach"
Elli is right.. you will have to get use to a "Wetsuit" anywhere in the bay area, if you do a search online, you can get a good idea what is out there? after that you should go to a kiteboarding store to try on a few before you "Buy" one, as it will have to fit "Right" from top to bottom.
If you kite in Alameda.. there is a shack right on the beach here where you can rent a used wetsuit to see what they feel like..again welcome and good winds to you.
Max be with you