My thought is that becoming a midwife first, then volunteering those skills in a third world country might be easier to do. That is my plan, as I've never been overseas. However, there are places in central and south America, and Mexico, where you can volunteer and bring your family too, I think. I'm planning a Spanish language intensive for this spring in central America, which sort of counts, as it combines health care work.
As far as being a doula helping get an L&D job, I'd think it would and should help ... the problem is, as many L&D RNs on this board can tell you, is not every L&D unit practices labor support and the RNs may not know what it is so they need education. These places tend to be not very friendly to midwife or patient centered birth -- they are very medically oriented. If you find a hospital that has doulas, and/or midwives, and they practice labor support, you will have an advantage when you interview. Check with the doulas you know about the local facilities and their philosophy of care. If doulas aren't well thought of or used much in your hospital where you will eventually work, you can become a change agent and change that
get practice being a change agent and introduce labor support as routine standard of care (this will sell you to the admissions committe, believe me! you will prove to the faculty you can walk into hostile territory to midwives and make friends and change hearts). Once you're in CNM school -- if you're in a good one that has a lot of nurses in the program -- the faculty will tell you to start advocating for family centered and low intervention birth NOW as an RN. Use the doulas you know as resources as they know your area and the philosophies of care.
Check out Rush University Medical Center in Chicago -- their OB nurses, several years ago, systematically adopted labor support as routine nursing care and implemented a program whereby they convinced the medical staff of its value. You can find their website and contact somebody in the OB nursing department; I think they gladly provide consults and "how to" establish this philosophy of care in your OB unit.
Good luck to all of you. I think advocating for women, to educate them in their reproductive choices, and how to have control over their bodies and pregnancy and birthing experiences, is like missionary work.
TTFN and happy holidays!