Thank you kind sir!1. 2 - 3 months for AOR is normal.
2. You'll need to be in Canada for interview and oath AFAIK. For other events (test), you don't have to be in Canada. Interviews are rare these days.
3. You'll need to be in Canada for oath. 12 - 15 months after application IMO (conservative estimate).
4. Everything is done via email / online requests. You'll receive the citizenship certificate via snail-mail.