Is there anyway to create a subdomain? I've attempted to just create one through Plesk. IE: m.axiomotion.com, it gave me a user/pass to upload into, but whenever I attempt to access it... nothing pulls up. Some help would be appreciated.

Sure. You can either do it like you would a normal domain, or you can do it in the same domain in Plesk.

You are creating this subdomain on the same box that the main domain is on, correct?

If not, you're going to need access to the DNS wherever the main domain resides so you can tweak it. The dns still needs to point to where the sub resides.