If you really be at rest, the universe would run away from until part of it smashed in to you at thousands of miles per hour.

Not sure what you mean by forward expansion of the universe. Forward in relation to what?

Terms like forward and backward refer to movement through space of an object that has a discernable front and back. E.g. cars move forward, asteroids do not.

The expansion of the universe isn't movement through space, the space itself is expanding. If we had to give a direction to describe the expansion, the only one I can think of would be "outward", but that's probably wrong also for similar reasons.

I'm sure someone out there can do a bunch of math and blow all our minds, but how does one describe in absolute terms what is happening when you take two steps backward on the surface of a planet that is rotating while also moving through space in orbit of a star, which is also moving through space in orbit of the center of a galaxy, which is also moving through space in relation to other galaxies, all while the space itself is expanding?

Thank god for that! I mean...