Maya to autocad / revit

Hi,

I'm a 3d artist / vfx artist, working with Maya and Houdini.

I was wondering if i do any good by learning Autocad or revit for skills in later use on visual effects?

Or am I losing time by learning those programme's?

Also... i see alot of programmes like Autocad, Revit architecture, MEP, etc. Civil 3d, Whats the difference?

Whats the best to learn for a visual designer of buildings?

thnx