A simple calculation of earth’s orbital speed around sun

From speed of light, time of flight of light from sun to earth, the orbital speed of earth around sun comes out to be ~33 km/s. You can adjust the speed of light and its TOF to get a more confirming value. (~30 km/s)

For earth’s spin at equator we expect a speed ~0.5 km/s. One can obtain this from earth’s radii and it’s 24 hr motion around itself. Calculate and give me a snippet ..