Taking dramamine would be good as stated, i feel like that alone calms me down alltogether but my first time on a plane i was terrified! and i am someone who is prone to getting motion sickness on car rides and buses if i dont take dramamine. take off and landing is really the only time you feel something and even then it is not bad. exactly like an elevator! as for the actual ride, it feels like NOTHING. like seriously. nothing. it feels as if youre just sitting down at home on your couch. the first time i flew, there was actually a storm two hours into flying. there was turbulence. it felt like being on a slightly bumpy road, i thought: finally, some motion! watch some youtube videos of peoples first times on planes, i feel like that eased the situation a bit. youll be fine, but maybe a bit bored on such a long flight, so try sleeping or keeping busy! hugs

i just saw how old this post is, my apologies! haha, i hope it went well!