RE: Best beginner aircraft...
Get the simulator. It really helps for stick feel and muscle memory. Plus you get to crash as much as you want while learning and it costs you nothing. Fly all types of airplanes including your Seawind.
As for trike gear trainers. That is primarily all there are with an exception here and there. They are easy enough to make a tail dragger if you so wish. Just grab a tail wheel assembly and move the main gear forward. I built my trainer this way. If the gear isn't quite tall enough for you, put some 3 1/2 inch wheels on it and make it look like a super cub! Tundra tires!
Good Luck,