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Do you have a couple of links perchance
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https://www.enneagraminstitute.com/type-descriptions/ (for basic understanding) https://www.truity.com/test/enneagram-personality-test (for a test) I'm not so sure what other links to give you so lets just start with this, and you can do more research yourself if interested!
That's an enneagram type. It's a sort of way to categorize your personality, it gets a bit complicated tbh but I learned a bit more about myself with it.