I just want to add a few pointers to LaRue’s comments: I am sure you got your personal trainer credentials because you have a passion for personal fitness, and in your case that should be on your resume as well. If you have participated in any sports (or still are), this is a skill set of importance to note.
I also read the introduction of yourself here at IDEA FitnessConnect. While I applaud your honesty in owning to your inexperience and willingness to learn, do not forget that this is a place where people go who look for a personal trainer. I would dwell a little more on what you DO know rather all that you still need to learn.
I wish you good luck.