I never felt unsafe traveling through Africa. IVHQ takes very good care of you from the moment you exit customs at the airport until they drop you off at the airport.
The work is not as hard or as long as you think. There is plenty of down time for personal enjoyment. The activities you feel are beyond your capabilities can be handled by the staff. There is still so much that you can contribute.
This is a great program for all ages, including seniors and retirees. If you have food concerns, we were served westernized foods: rice, potatoes, broccoli, pork, beef, green peppers. Breakfast is Oatmeal. I suggest brining your own honey, nuts and dried fruits to add to the oatmeal. I'll the food served to us was actually very good and tasty.
Bring good gardening gloves, knee pads and a hat and a helping hands attitude.