Hi there
Have you thought of joining The Guild of Motoring Writers - the subs is a bit steep (I think about £90) but it does include free AA breakdown cover. There are a number of awards for young motoring journalists, so if you had some good features to put forwards you might be able to get a bit of recognition that way.
Also, can help to have a specialist angle - mine is women and cars/learner drivers/consumer issues around motoring as opposed to the more petrolhead stuff.
Good luck with it - check out my website, it's got some useful links.
Best wishes
Maria
www.mariamccarthy.co.uk - author of The Girls' Car Handbook and The Girls' Guide to Losing Your L Plates published by Simon and Schuster.