Im young-ish (20) and found kwick fit to be considerably cheaper when getting my motor insured (notice I say cheaper, not cheap as I'm still paying stupid money just to be insured, I want all insurance people to burn, except Martin). Also just echoing what someone else said, at 17 don't mod your car becasue these insruance companys will bum you till you bleed. Keep things standard for a few years, either that or get bumed.
Good luck