Fishing in open water is a lot different then fishing inland!
I would suggest a course on boating safety with the US Coast Guard Auxiliary http://nws.cgaux.org/index.html
Bay boats are not normally equipped with the necessary gear for fishing offshore safely. When they are equipped correctly and in the hands of a knowledgeable skipper, they can be a lot of fun.
One quick scenario:
It is a nice sunny day with a east wind of about 15 mph. The beach is calm do the offshore breeze. You run about mile out to take a look, your motor quits and you can't get it started, you through the anchor over, and you find the anchor line is to short and/or the anchor is too light to hold. You don't have a VHF marine radio, so can't call for help. You did not leave a float plan with anyone, so no one knows where you are. Next stop Mexico!
Capt. Tony Blizzard