When I first got my C22,
I had to learn about maintaining the boat (a 1978 model) as well as how to sail her. First, with a 1975 model, you will want to become very familiar with things that can fail catastrophically, such as standing rigging, rudder, keel and the outboard. Once you are comfortable with their condition, you can concentrate on sail trim, particularly on adapting to changing conditions. I would get Don Guillette's sail trim charts so you can sail optimally for various wind speeds and headings. On the Jersey shore I presume that you have the potential for very rough conditions for a C22, so lean to reef and change head headsails if the wind and sea state picks up. Good luck - you've got a boat that can be a lot of fun.