First Subaru, advise would be appreciated

[RossGray]

Hi there, just bought my first ever Subaru, it's a Impreza RX 2.0 petrol, I'm 21 and it's the only thing I could afford to insure at the moment but I'm still over the moon I've got my first Impreza. Just looking for any general advise please, anything I can do/buy to improve the performance and get the most from the car. Also looking for tips and advice on servicing the car and looking after it, cheers guys, Ross