Keep your long term goals very high, but start on some nice looking (6.5-8) to develop your dj skills. Use the advice in the bible, and then you will find your own niche and moves. Look at it like this; you are improving your skills, if you get some dates so be it. Don't be picky, just make sure the girls you approach are attractive. There is no reason to work your skills on pigs.
Even so, don't be reluctant to approach 9+ girls, to realize they are just as human as everyone else and rejection is nothing to fear.
But keep your long term goals very high. Never settle for anything less than what you want in life; but make sure you are doing this for yourself as a way to improve, and the girls will be attracted to you.