I used to fly around the country a lot as part of my work, but now I rather enjoy visiting all those places at a more leisurely pace.
First rule, you're retired now,. and not in a hurry. Relax and enjoy.
Second rule, KISS. Keep it simple ........ Don't overcomplicate things.
I de-winterize by filling the fresh water tank and start using the system.
If they filled the fresh water pipes with anti freeze run the water for a while
to flush it out. Tastes awful.
Third rule, take a short shake down trip. Maybe in your drive way. Use all the
systems and find out what works.
Fourth rule, Relax. Have fun. Enjoy. You're bound to have some problems, but just take your time and solve them. It's a brand new adventure.