There are plenty of books and things out there as well and probably pamphlets on local information. The thing to remember is that a lot of not very smart people go fishing, so the information has to be as clear as possible. As long as you are safe (wear a lifejacket! take a first aid kit!) and smart about it there's no reason to worry about being a first timer on a fishing boat.
If you're really nervous, try a couple of fishing boat charters with a captain on board and ask him or her all your questions.