Being young, if looking for your first ride, it’s best to avoid a modded. That’s because one tends to do focus on the mods with rose coloured glasses and as a result misses other obvious signs of abuse. Oh, cheap modded cars are abused disposable hoonmobiles
As such it’s better to buy a bog standard car and inspect it with someone older that you trust, someone who isn’t emotionally attached to a purchase. Then look at service history and the general condition of interior carpets, seats and door trims along with pedals for wear and all switches and buttons actually do what they are supposed to do... Oh and check all globes work... Also look at how many previous owners the car has had and how long the current owner has had it for... Id say stay away from flippers or people who’ve had yje car a short time, else you buy someone else’s problems.
If service ownership, service history and interior looks good, then check condition of body paint work and else I ally panel gap alignment (compare one side to the other and any noticable differences would be due to poor crash repair). Also check door jams, sills and such for cleanliness and good paint that matches the body.
Finely go for a drive and ensure gears change smoothly with no odd noises on start, acceleration, braking and turning and all dash gauges work... Any odd noises, walk away unless you know exactly why the noise exists.
Obviously unmodifies one owner vehicles with impeccable service history that is owned by an ocd car nut is the best but you’ll pay a premium for such...
Others may be able to offer specifics about known faults if you can give them an idea of what year/model/variant you’re considering and the budget you have, else it‘s just general tyre kicking