Purchase advice (first car)

I’m mostly new to cars; as in I have driven them (obviously) and know some surface level knowledge. However what I lack is practical experience. I have never worked on a car, never been taught how to diagnose issues on them never been taught how to replace parts, and never been taught anything about modifications, aside from a few youtube videos. Most of my information comes from research rather than personal experience, and with that being said, I’d like to hear yours.

I’ve been looking at multiple different affordable options and have settled (mostly) on the 2012-2014/15 hyundai genesis sedans. I’m looking more towards the 3.8L v6, and have found numerous options for under 10k in my area. Mileage usually exceeds 100k on these cars, but there are a few that are around 70-90k. What should I look out for concerning price and mileage, and what warning signs should I avoid? Any and all advice would be greatly appreciated.