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Ludo-narrative Dissonance
(i.redd.it)
If your character's starting off at level one, they're really only getting started with adventuring. You can let that be reflected in their backstory.
If you want to play a badass, starting above level 1 is allowed, though probably not recommended for new players still learning the rules of whatever system you're playing.
To be fair, if I was aiming literally anywhere else but down at a rat crawling over my foot, it probably would have been a misfire or a bad ricochet.