Well, you CAN participate, subscribe and read the community of another instance. You don’t have to be part of the other instance to do so.
Just make sure you are browsing / searching all and not just local.
I am reading and writing this from kbin and not even Lemmy btw.
Get chewing gum and take one on take off and later descent, it helps with pressure release for the ear’s.
Don’t get worried about the noise the aircraft makes when flaps or gears travel.
If the flight is longer try to get a place at the walkway , you could stretch the legs out.
It’s is nicer to sit in front of the wing area, less noise and flight path changes are more easy to handle.
Don’t sit near toilet’s, smell and traffic during flights.