Seaplane flying is fun - so go out and enjoy it! I flew a C172 floatplane in Seattle, good fun, but the rudder didn't do anything a normal aircraft would have done!! Also flew 30mins in a Beaver, the larger aircraft was much easier to fly and more stable. Never been to JB's, might go one day to get a complete rating, let me know how you go.
Ref visiting the FAA, also take another form of ID with a picture on it. I had to make two trips!!!