Almost ANY other car is better than a Micra
However a standard impreza is just a boring old saloon
£1k might get you a better car, but it’s still going to cost you the same again in insurance, at least
How about get a motorbike licence? £1k will cover all the fees for the tests, and you’ll have the licence for life. A motorbike will give you more thrills than many cars. I wish I’d got my licence earlier (did it just before I was 27), I had more free time then and could have gone on long trips etc on the bike. That sort of thing is less appealing in the car (solo, or in groups of solo drivers anyway)