They don't fall a gravity well, they follow straight lines in a curved spacetime. Not subject to the other forces everything follows the straightest line (geode

They don't fall a gravity well, they follow straight lines in a curved spacetime. Not subject to the other forces everything follows the straightest line (geodesics) it possibly can in a curved spacetime. The field equations define the spacetime geometry but they are very hard to solve, you will gain little insight from them. Instead you should try to understand the concept of a geodesic, how they are extremes of a variational problem, how they are calculated and the physical/geometrical intuition behind them.