im originally from eastern europe (belarus) but have been living in the uk for 11ish years !!
people are generally good, if you mean fellow students then they can start out absolutely awful but by year 10/11 they mature and actually become relatively decent. i never had much success with adults personally, but they're pretty hit and miss; in either case you can always find friends pretty much. school depends highly on which one you go to, area wise, and what kind of people you hang out with? id say its mostly decent, its definitely much easier than the eastern european school system. food is GREAT, like some of it is awful and i wouldnt get school food if someone paid me to do it, but if you just buy your own from like, asda or something, you're sorted. the weather sucks, politics suck, money is kinda hard to come by, but honestly i would rather be here than back in belarus so i consider it a win. its definitely really good, and if it seems like it sucks in secondary school (i hated school, it wasnt great at all), then it does get better in college and uni !!
i hope this helps? lmk if u wanna know anything else !!