First, if you really are 16, you need to be congratulated on your use of the English language and your ability to convey it in the written form. Posters constantly butcher it here, and it's refreshing to see a post that is coherently written.
Second, if you are that meticulous about your posts, my guess is that this continues to other areas in your life, including officiating. Advise: apologize to the clinician, tell him you will continue working on his advise, and ask him to evaluate you in the future to help you gauge your progress. [He could probably use some advise on being tactful and professional, but that's his problem, and we'll help him with that when he posts his message.
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Finally...don't be a "YA, BUT" person. Be a "YES, SIR (MA'AM), I'LL WORK ON THAT" person, and you'll go a long way.
Good luck!