What if I’m in a country where people aren’t comfortable buying tickets online?

It's completely fine. There are a bunch of these countries/cities in our community. Feel free to create a cash-at-the-door ticket type so they can RSVP online and pay upon arrival. Just make sure you communicate it well. People will have to bring cash and pay you before the event starts.

Please check the following article too https://help.startupgrind.com/article/106-cash-at-the-door.