From Bangkok/HK/Vietnam you can travel to many interesting countries on shorter flights with less time zone change.
From US, only 2 large countries are close.
Plan 2+ weeks to get more out of the travel burden. Stay in Airbnb condos/homes to make life more normal.
International travel is biological wreckage. It's not my intent to rain on your parade or suggest you not travel.
I learned first hand from measuring my biomarkers traveling to China, India and Australia. Sharing to be useful in your life decision making.