Where do I go to learn how to sail on the ocean? ?

Last year, I went to camp and did a program on sailing for a week, but it was on a lake, and with very small boats that barely fit three people - one to rudder, one to pull the sail, and a mermaid who just laid at the front. I imagine it's a lot different on the ocean, but I really like it. Are there places in Cape May or LBI where I could rent a sailboat? And/or take lessons? A cost range would be useful.