So I don't know where I can ask this question but I'm currently in uni, but not in the UK, but in America. I am an international student and I'm not a native speaker of English. I have been practising British accent for a while and my new teaching assistant is from Oxford, England. Though he did not speak posh at all. I am wondering is it ok to talk to him and ask him some feedback on my accent? Literally he is the first British guy I have met at the school and i am aiming for rp, so I figure I need some help. But is it considered rude and unprofessional in the UK to just directly ask people about your accent? Do you guys think I should ask I'm or not?