Meaningful motorization?

Hello, I know there are already countless purchase advices here, but this is my first post here and unfortunately I did not find much helpful on this topic. Very short to me: I am 22 years young, currently in education, at the end of the year student. Search now a V or S40, because on the one hand I need a new vehicle to get to work (the old one is returned) and on the other hand to transport two medium-sized dogs. I drive routes to 80% city, however häu fig before the traffic lights are already on but still short (<8km) and 19% highway and 1%AB with a total output of approx. 8000km per year. Not much so. I would like to spend for the car so 2-3000€ at a current mileage of max. 175000km. Since here only one petrol "remunerated", would interest me now, which engine variant was most suitable for me? The selection is not so small with the cars... For recommendations and advice I am always grateful. Greetings from Au gsburg P.S.: He doesn't have to be fun. But if he does, it's not bad either. But first and foremost, he has to be practical, "sparable" and reliable.