Okay, so I use solidworks for modeling cuz I used to take engineering classes and I learned how to use that program so I figured its best to just work with what I know. So I made something in solidworks and I did some research and found that I can export stuff from there to blender. I don't know what version of blender to get because if i'm not mistaken I believe not all of them can convert to dts or whatever i'm not to knowledgeable in this subject but I want to learn. So I was hoping someone could help me with what version of blender to get, and how to scale the thing I made down do the size of a blockhead.
Heres a pic of what I made

Not the best thing, but I just wanted to start somewhere