Hmm. 16 or 17 I guess. It is quite difficult to make a better prediction. Usually I would have to look at a persons grammar skills to make a better guess. Your metaphor tells me your well educated. So 16-17. Your Armatar does not give me any clues though. I haven't went back to school so i honestly don't know if that was a metaphor. I'm going back to school in 2 weeks ;(
Well highschool tends to start before middle school, and i know some schools have already started, so if your not starting for another two weeks, that possibly means you're in middle school (meaning I'm making a guess that your 14 or below)