I found volunteering to be a good entry into international work , even though it hasn't developed at this juncture into a long-term career. Although we didn't see eye to eye on everything, CUSO was a good organization to work for and provided good financial, medical, and logistical support. Overseas work is not for everyone. Living and working in even a tourist destination like Vanuatu is not anything like a vacation visit, and at least six months are necessary to even start getting a feel for a place. There are the dangers of tropical diseases and medical care that is not up to the standard at home.
Safety standards can be lax.
Policing may not be up to the home standard, and rich expatriates a target of theft or violence. There is no pension plan. Spouses usually can not find paid employment. Schools can range from excellent to awful, or involve one's children living away from the family. One has to make new friends constantly as his or their contracts end, and the extended family is far away.