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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.
Level 1 might be a good place to start for someone who's never heard what a TTRPG is. Your abilities list is small enough that you don't need to think hard about what you can do for every round of combat, and you probably have very few out of combat abilities so you just roll for it.
That said, it's also really fucking boring. If you want them to have a good time, they better get through the first few levels quickly.