You are right. As the space is absolute and serves as a static background, the speeds are absolute. The individual speed of Earth is 30Km/s, ie, it covers 30Km of absolute space in one second. However, the galaxy- cluster to which Earth belongs carries the Earth along with it at a speed of nearly one-third of the speed of light. In my model, the clusters are spiraling outwards from the centre of the universe, and not revolving around the centre.

You can visualize yourself as moving in a boat in the dark with no clue to the direction, the speedometer just tells you that you are moving at a certain speed. Similarly the Earth, Moon and Sun have their individual speeds, the only indication of their absolute motion is their gravitational constants, which are proportional to their individual speeds (as per my theory).