I was born and raised in a coastal town in Asia and learned to surf when I was young. I moved out beginning my adolescent years and lived in towns hundreds of miles from a nearby ocean thus prohibited me from going to the waters. Few months ago I had a job opportunity that allowed me to move to the beautiful city of Santa Barbara in California. Walking on beaches once again and looking at the great surf opportunity I want to get back into it again but I'm unsure of what to get.
I'm definitely in between the novice - enthusiast level but more towards the novice part due to the amount of years I have not been back on a surfboard. There are many surf shops near me that can help me but I still want to get some general information on what to ask for so it wouldn't be a long process.
I am looking into Fish boards or Fun boards.. will these suit me well? The shortboards are for more advanced surfers right?
I am 175 cm tall (5 ft 9 in), and I weigh in between 160-170 (Trying to lose weight for triathlon)
I am un sure of the dimensions of boards to look for.. I hope you guys can help me! I apologize in advance if my English is hard to understand.

Also, should I buy a new board or just buy one suitable off of Craigslist? I don't have much money to burn after putting in on a good road bike haha..