force field and 3 celestial body interactions

I would like to simulate a situation where there is a planet, it has a moon that is half the size of it and then a moon that is third the size of it.
Is it basically possible to simulate the orbits with force fields?

I don’t think so. I think you would have better luck using parenting then rotating about the parent.
The planet could be the parent of the moon, and the moon can be the parent of the sub-moon.