From my understanding you can imagine space and time sort of like a trampoline. You put a bunch of marbles on the trampoline, they aren’t heavy enough to bend it much so they roll around on their own. You put a bowling ball in the middle, and suddenly all the little marbles are pulled to the bowling ball.

We’re marbles, we don’t bend the fabric much, but we live on a bowling ball that does. Mass causes a distortion in spacetime, that distortion causes the effect we know as gravity.