Stand up Paddleboarding

I am going to be cruising with 3 18 year olds that want to do the stand up paddleboard. Is that available off the beach beside the ship or at margaritaville? I dont really want to book an excursion for this. We have Bernards tour in St. Maarten, Thenford Grey in St. Kitts and nothing planned for Grand Turk. We just thought we might could find this on the beach. Thanks in advance!

I found this:

https://www.visittci.com/grand-turk/things-to-do/stand-up-paddle-boarding

on Google