Wall-mounted paddleboard storage racks are usually attached directly to the studs behind your wall with long screws. With a stud finder, find the ideal place and then use the included hardware or 3.5-inch screws to install it. A measuring tape and a level may also help!
Though not a must, you should possibly consider having an aide to handle your tools and support the ladder. Similar to wall attached racks; ceiling-mounted racks are usually screwed into the studs directly on the joists of the ceiling. Therefore, a stud finder comes in handy.