Boating lessons?

[Aguamenti]

Can anyone recommend someone local that gives boating lessons? I am looking to become a first-time boat owner within the next year, but I don't want to go into a purchase like that without some actual experience and instruction on the water, with trailering, launch, etc.

I'm in Tuftonboro but don't mind travelling around the lake if there is someone that comes highly recommended.

Thanks for any advice.