Right Surfboard For Beginning Surfers?

For beginners who want to surf all summer long, it would make sense to pick a surfboard that will last more than one season, one which you will not outgrow in a short time... but choose a cheap one to start with so you won't feel bad about the dings and dents it will get. A used one makes great sense. However.. do not buy a used one that has delamination or cuts where the foam is showing.. which of course is just common sense. You can get a custom made board.. one made to your specifications as opposed to a factory carbon output one, but that will cost more money. You can always go better after you learn the basics and are really ready to put on a show. You will by then be past the heavy dinging stage. Don't worry about how many fins the board you choose has. This is not a factor in learning to surf as the purpose of the fins is to help in turning. You won't be worrying about fancy turns while learning.
Whatever you do, do not fall into the "LOOK COOL" factor and decide to get a shortboard. They are not meant for beginners... as they are short and narrow and have thin sharp rails, or edges, that are designed for fancy turns and maneuvers by advanced surfers. Start with the longer, wider, more buoyant board and you will soon be looking for that cool shortboard and will be able to use it by then ... properly.