You did well getting all around the lake for your first time out, and you look dry!
Next, you'll be wanting a weighted keel rig, or a catamaran.
Former co-worker got the bug to sail and bought a weighted keel 20' boat. First time out he was tacking into the wind. On one turn he didn't get the sail shifted over and the boat capsized, throwing him into the water on Kaw lake. The boat righted itself and took off. He grabbed a trailing rope at the last second and got dragged across the lake until the boat grounded itself. His sailing stories were hilarious.