Could you check these? Are they all correct?
1) For someone from the country like me, New York is too big and noisy.
2) For a countryman like me, New York is too big and noisy.
3) I was born and raised in the country, so New York is too big and noisy.
Good.
No. A countryman is a fellow citizen of a country. You can say "country boy" or "country girl" in the US no matter how old you are.
OK.
Oh! I didn’t know that. Thank you very much for your insight, anonymous.