If you know the pilot and have flown with them a few times, they might let you do both the landing and the takeoff. I've never landed on the water, but I've landed on skis and over-sized tires on the river's shore.
Most pilots I've met are happy to encourage a love of flying. Planes are pretty common here (outside Rangeley, Maine) and I've been encouraged to get one. I probably won't, but I do consider getting my license.
And noted. I may see if I can get a flight. My long term dream is to acquire float plane.