In addition to surfboard rentals and surfing lessons, you can rent stand-up paddle boards and take lessons at the south end of Kalama Park, just a few blocks from our Maui Vista condo. Go in the morning when the wave action and wind are down. There are several trucks from which you can rent equipment, or you rent from Maui Wave Riders located across the street. Maui Wave Riders also provides lessons.
I’m not sure if it’s really necessary to take a lesson to learn to paddle board. I did and didn’t regret it, but it cost $65 for the board rental plus a “lesson” that lasted all of five minutes. On the other hand, the instructor was always with us and he took us to a great spot over turtle reef. Lots of turtles there. They’ll surface right next to you and swim under your board.