Personally I wouldn’t feel very safe on the motorway with something so underpowered- 16 seconds to 60 is really quite a long time. For round town, sure, it’ll probably be fine.
Reliability was my number one concern, that’s why I went Japanese.
There’s always going to be a trade off of your budget is 6k. If you want something only a couple of years old then it will naturally have to have been a very cheap car in the first place. At the other end of the scale you can probably find an old BMW 7 series with a bazillion miles on it that originally cost a fortune for the same money. It’s not what you want op but just making a point- you’ll have to find a balance somewhere. For me that was the focus/civic/golf territory and 6k will only get you so much. Good luck btw