I understand where you're coming from, and while I don't particularly think your comics are stellar they are quite better than many done by people twice your age. However, don't use your age as an excuse for a lack of vocabulary; I was using those words and others like them when I was half your age. In the future, use a dictionary or something of the sort if you don't know what a word means, or ask someone. We won't hold it against you, honest.
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If you do just one thing in life, then you need to get out more and expand your horizons. Honestly, that one thing can't possibly take-up all your time.