Jaco is one of the best places to learn to surf. The waves are considered to have a very consistent break, so they are great for learning. If you are more experienced, you can always try out Hermosa Beach which is 15 minutes away and has world-class surfing. Long boards are available for beginning surfers.
Learn to surf with Jaco Surf Club in Playa Hermosa and Jaco. The front desk can arrange private or group lessons with this local company. JacoSurfClub.com