I'm going to be very blunt. Based on the work on your facebook page, your skills are not yet at the level they should be when you are accepting paid commissions. Things that strike me about your body of work (in no particular order) are: Inconsistant processing style (almost every shoot seems to have a different look), a wide range of poor composition/cropping choices (cropped limbs, digits, too much/too little negative space, tilted horizons, etc). Many of the issues have serious white balance and exposure problems, blown skies are rampant....
That is not to say that you can't get there, and the fact that you're studying photography is a step in the right direction, but remember that the business of photography is much less about the photography than it is about the business, so while you are studying at the AI, find some business and entrepreneurship courses to take as well. There are many successful photography businesses run by people who are crap photographers and good businessmen, but VERY few that are run by great photographers who are poor businessmen!
By all means, keep shooting family, friends, Model Mayhem, etc, but NOT as a business. Yet.
The ways you can make a better picture are by learning and mastering the basics. Understand completely the science of exposure and how your camera records an image. Learn to "see" light as your camera sees it, so that you can look at a scene and know where blown highlights will appear, where an under-exposed face will be a problem, and most of how, how to deal with those issues. Two great resources are
Cambridge in Colour and
The Strobist Blog. YouTube has thousands of great tutorials on all aspects of photography from posing to studio lighting to the very basics of how your camera works. One I like a lot is
Creative Live they offer fantastic on-line workshops by industry experts (they're free to watch live or in re-run, but if you want 'anytime' access you do have to purchase it.
Another often overlooked resource is local camera clubs; they almost always have a few retired (or currently working) pros who will give you a LOT of great free advice. And, last but not least, TPF has it's own mentorship program (link in my sig).