Welcome SwedePete. I think you picked a very good Airstream for your full time dreams. Now you can share your experiences, both good and bad.
You'll need to assess the needs of your 89 commensurate with your intended use. Florida is lush, wet with rain showers most every day. So watch for leaks and get them repaired. I purchased a moisture meter and probe the perimeter of my trailer after a hard rain. It will indicate moisture on the floor. Just inspect the systems and appliances in your rig to make sure things are working. Then you can decorate as you see fit.
AirForums members can certainly be a source of good ideas.