Providing you "graduated" Flight School with all the necessary ratings i.e. at least CPL/FI(R) you could start instructing as soon as some school takes pity on you and gives you a job.
Nearly all instructors are low hours in the beginning, so self-conscious or not you just have to be aware of your comparative lack of both experience and ability to instruct a wide variety of people/aptitudes.
Flying skills are not usually too much of a problem as you are not doing anything that you haven't done lots of already.
I read somewhere that your first couple of PPL students should be "for free" as you learn more than they do.
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I've only recently started instructing and have learnt a great deal already.
Good luck anyway.
FIS