For here on SM a good tutorial to start with would be first off all the free ones (most of the modelling ones at least). Then I would suggest the Tie Fighter tutorial, then the Poly Head tutorial, and the a few other good ones to have is the 3 point lighting tutorial, and the UV Planar mapping tutorial. Sounds like a lot, but those ones are great starters .

BTW, if you do buy points, you will have them within the next couple minutes .