I've been in nature all my life, but i joined light flight for ~2 months before feeling homesick. But i did many things there. I talked to folk in the light forums, I donated a lot of eggs to the light vault so users could unlock their hibdens, and I participated on that year's dom battle against arcane, which was nice!
The only reason I changed was because my favorite colors are orange and yellow, but the backgrounds of the fire flight were too destructive-looking, so i chose light.
But i felt a deep connection to the nature flight. I missed the gladekeeper even though she wasn't real. I was kindly given the money to go back and i've stayed there ever since.
...But on the other hand, there's folks who change flight every chance they get. There's folks who change and feel better and stay there. My own friend started in the shadow flight before moving to the ocean flight because she liked pirates.
I say, move flights. Even if you want to move back later.
Your lore is connected to your dragons, not to your account specifically (if this makes sense) so try not to worry about that.
The money to change back will be made eventually. If that day ever comes, feel free to message me and I'll give you the money to go back.
You never know what tomorrow awaits for you. It's better for you to change and know whether or not you'll like it, than live your whole life not knowing