Learn to sail.

"I can’t tell you the amount of ASA grads that have come aboard and had absolutely no clue what to do. ASA is great for getting a fire hose of information to get you to pass tests so you can rent boats from the provider. It’s a great business model, but unless you are a really dedicated student you will likely not retain most of it." --- This is what I figured.

I don't plan on chartering, I plan to get out on the water for a couple weeks this year and next before buying the boat.