How exactly would I go about making a rubix cube, nothing special, just need outer pieces made
Well, don't take this the wrong way, but I would start with knowing how to use Inventor. If you already know how then its just a matter of drawing cubes. If you have a Rubix cube then look how its put together and reverse Engineer it.
Also I think there are a couple in the Grab Cad library, see how they did it.