Looking for recommendations for my first overseas trip

Hello! I live in Japan and I am planning my first trip abroad this summer. I want to experience cultures outside of Japan, but I haven't decided on a destination yet. I’m a bit worried because this is my first time traveling internationally.

I would love to visit a country that meets the following conditions:

1. English is the official language
2. It is safe (especially for a solo traveler)
3. It has beautiful tourist attractions, particularly nature spots.

Please let me know if you have any suggestions! Thank you for reading.