depends where you live, i go to hampshire bike trials club (HBTC) you could check www.biketrialsuk.co.uk, i think it is this but it is the bike trial union site, it has all of the clubs in england, includes contacts.
when i started comps i didn't do to well but this is my second year and im in intermediate now and im in 2nd, you rapidly improve if you keep at it (Y)