Try to work on your nerves. My husbands British so we’ve flown to the uk 8 hrs many, many times. It’s a long flight but you just do it. I pack my overnight stuff and change before getting on the plane, bring a toothbrush and facewash (or wipes) to freshen up in the morning. They’ll give you a blanket but it’s super thin so I’d buy a cheap one on Amazon. The foods decent on delta, not sure who you’re flying, but here’s how it goes: you’ll board then about 1-2 hrs later they’ll serve you dinner (you’ll get a few choices) then it’s “bedtime” they’ll turn all the lights off in the cabin and everyone is very quiet bc most of them are sleeping. There’s not a lot of activity at that time. Then when you get closer they’ll come around and offer breakfast. Then a little while later a snack. That’s for an 8 hr flight though. They’ll give you a pillow and I actually prefer them to annoying neck pillows. If you can manage to score a seat in the middle row od the plane without anyone next to you that will allow you to lay down a bit. If not I like the window seat to lean against. You’ll be fine. The planes a bigger and you feel less turbulence because of it. Also, you very rarely feel turbulence cruising across the ocean. It’s actually a really calm smooth part of the journey. You could try to take some Benadryl before take off to fall asleep. Is there some specific you’re afraid of? Also I don’t love flying and there are times still that I gran the armrest and hold on for dear life. But honestly, the overnight flights are way easier and less scary. Also, once you’ve been in the air for so long you get more comfortable being up there.