I think doing your confined water skills in a pool about 12 ft. deep is better than the ocean in about 6 ft. of water, which is why I would recommend doing your class & water time at home & check out dives at S.P.
But it really depends on your comfort level in the water, It may take you 15-20 dives to feel the comfort level in the ocean, everyone is different.

P.S. you still have to watch the videos even in S.P. I believe