The actual surfing bit is fun, but it doesn’t last long and the rest of the time you need to be quite fit, fit enough to paddle out through the break, fit enough to hold your breath for what can seem like ages as you go through the rinse cycle and fit enough to paddle fast enough to catch the ride, which is all about timing.
So right now? get down the swimming baths and pile in a few lengths, test yourself under water oh and upside down, do a few underwater somersaults to simulate what the waves do to you, if you can find a couple of mates to beat you up whilst your down there you’ll get the picture..
As i said, surfing is quite fun, the rest of it can be tedious and very energetic, get as fit as you can.