Start by posting your work in progress shots in 3D Showcase, and keep posting updates as you progress along. Tons of good resources out there for self-directed study. For example: http://wiki.polycount.com/wiki/Roguedevelopmentdiary
Id say just make something dont worry about all the things you do right now .Can you for example make one of those ? You just need to learn a few things to start making finish pieces so just watch any free tutorial that run the whole pipeline Basically what you need is to :-create form -> modeling or sculpting software…