You do not want a glow Seawind for your first seaplane. They need flaps for a good landing and prefer them for take off. A buddy of mine has one with an OS 4-stroke and it does fly well in the air, but it is not a plane for the novice. He is an excellent flier and he landed a little hard and split the hull.

Look, you have gotten some good advice that you seem to not like. Any trainer will work, but if you have any wind, you take the chance of flipping it over when you turn crosswind. You know how when you turn crosswind when taxiing in and a wing will pick up. This same thing on the water will cause the float to dig in, rotating the plane, putting the tail into the wind and the plane will rotate over on its back.

The best advice it to get a Seamaster, or better, a Neptune. The flying boats don't require getting the float step at the correct location or getting them at the correct angle. They aren't going to tip over and they'll do about all the acro you want.

I like the Neptune because it doesn't have a landing gear. The trim is different when you take the gear off and you are making holes for water to get in. In addition, the Neptune seems to be made better. A .46 will pull them fine. They are fast with an OS .46AX.