what do you mean problems starting up on sparring? from what you have said it seems to me you are in the beginning stages of sparring.sure your not doing free form but you are getting used to a "sparring like" situation.and i'm sure once you advance your instructor will let you do it.remember the old saying "the hunter that chases two rabbits catches none".
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"The early bird gets the worm, but the bird in a hurry only gets half of one." --- Sensei Corey