question about social life

hi! got into cambridge on thursday (international applicant, american) and this is probably an absolutely ridiculous concern but my perception of the international reputation of a typical american is obnoxious, annoying, not particularly intelligent, etc. Is this the predominant view in cambridge or is my view inaccurate?? just wondering if (assuming i do choose to go here) people will have a not-so-good first impression of me 💀💀💀