Well, you can't go wrong with the basics. I would say burpees, pushups, squats, situps, back extensions and pullups if you have a place to do them. If you have more time, add a few strength moves on the off days, such as handstand pushups, L-pullups, Pistols. To make it really easy, make every other day metabolic conditioning, such as:
-As many rounds in 20 minutes as you can: 15 burpees, 15 pullups
-5 rounds for time: 50 squats, 25 pushups, 50 situps
-4 rounds for time: run 400m, 15 pushups, 15 situps, 15 pullups
-21-15-9 of the following- Handstand pushups, L-Pullups
Then on the other days, focus on strength-
-5x3- Handstand Pushups, Pistols, 1:00 Front Plank
-Planche Progression, L-sits, Handstand Press
Hope that gives you some ideas!