I know here in SA, the RAA, Australian Red Cross and Baby bunting have professional fitters available - and it only costs around $20-$30. So first time around, I'd get it fitted by a professional whilst you and DH watch, that way you know its in correctly, plus you can see how to do it in future. I think something like 80% of car seats are incorrectly installed, so its better to be safe than sorry I suppose.