Pick a country, research what food it has that you've never tried, find a few online recipes and YouTube guides and give it a go.
This was a ton of fun. I have no idea if anything I cooked was even remotely like the authentic original, but it was still a very rewarding exercise.
If you live somewhere with a lot of international supermarkets (the SF Bay Area is great for those) it also gives you an excuse for a shopping adventure for ingredients.
(My favorite recipe we tried with this was Doubles from Trinidad https://www.africanbites.com/doubles-chickpeas-sandwich/)