opening myself to ridicule here.
When young, studying physics on my own, I thought through concepts I was studying regarding gravity, the Michelson-Morley experiment, etc. I noticed that the MM experiment to detect luminiferous ether was conducted in only one plane...horizontal. With a bit more thought, I realized that if LE were to be detected, it would have to be detected horizontally. With still more thought, I tentatively concluded that gravity is LE ‘falling’ to earth (to any mass, actually, but that which is ‘falling’ to earth is ‘pushing’ smaller things like me towards the earth). Reading on other experiments like those demonstrating the Mossbauer effect gave me support for my thoughts.
(I even built my own MM interferometer to play around w/ my ideas)
I still wish I could discuss this with someone willing & knowledgeable.
Bernard Haisch, et al, have postulated that the zero point field (of what Feynman called ‘partons’ in his QED) gives rise to inertial mass by an electromagnetic van der Waals force at the quark level of mass. Think of it as a pool filled with marbles and anything in the mass of marbles is being pushed from all directions by the marbles, so if you try to move you are pushing against a resistance from the marbles and that resistance will be proportional to the effort you put into trying to move. The equation F = ma (force equals mass times acceleration) can be rewritten to show the mass as sourced in ‘parton push’, with partons sized at the Planck scale for wave form.