yeah you only have to do double security if the airport is just unorganized and you have to switch terminals.
I always find it kind of peaceful to when I'm on flights, I would suggest getting a copy of the Quran, Shakespeare's All's Well That Ends Well, or the Anarchist's Cookbook.
Aye, not to mention that even if you do, you've got nothing better to do.
I dunno if you booked it yet, or how tall you are, but try to get the emergency exit row. It has monstrous leg room compared to the other ones. I'm 6'1~ but I'm very uncomfortable in normal seats (at least on spirits), so I/my mom tries to book the emergency exit rows and it's wonderful.
I've already booked and I'm only 5'8" anyways lol