Don't panic, there will be lots that are compatible! I would recommend joining the 'car seat advice for mummies and daddies' Facebook group. It's run by car seat specialists and you can search or ask their advice about your car.
Firstly do you want forward facing a rear facing (RF is 5 times safer). Then you need to think about your child - track their weight and height in their red book. If they will be 18kg or 105cm talk before 4years old, you will need a seat that goes to 25kg. If not, you might be ok with an 18kg seat.