If you are a decent swimmer and in decent shape you could take a couple of one hour lessons and being having fun in a few days. I don't think it is necessary to take a five week course (is there such a thing?) I learned by trial and error. A slightly larger board may be easier at first. Buy a used board and a wet suit using the Recycler (
www.recycler.com) or Craigs List or Play It Again Sports. Try to learn at places where there aren't a lot of people (You may have to drive up north towards Santa Barbara, but what the heck it's a nice drive.) I was lucky, I used to surf at Point Mugu Navy Base, It has an excellent break and only those who have base IDs (employees and Naval personnel) there are allowed to be there, so it was never crowded. Don't try to learn on waves bigger than two feet.