Buying advice Seat Leon 15,000 €

Hi dear forum, I’m looking for a new car. I have the Seat Leon as a limousine in mind (doesn’t you call it that? So not the station wagon!). My budget is about 12-15k €. Therefore only a used car is considered. But I would value a rather young used car, maybe 2018 or younger? I would also like a variant with 100+ hp. Preferably in the area of Hamburg or nearby. Since I have no idea about the Seat Leon or cars in general, I would like to But if I did, I would need your help to find out which features I should pay attention to. What would you like to have in a Seat Leon 2018 or younger? I would be very grateful to you for any help or queries. Best regards!