get yourself down to the Northern Quarter, great site, not far from the airport so easy to get to even if your not coming by car, great bunch of people there, even if you dont have your own kit they rent out high end markers and playing gear...
take a look at this
CLICK HERE markie runs regular newbie tourneys which are a great way to get used to tournament paintball, will teach you everything from walking the field to the pressure of tourney ball
next one is on the 20th of this month, there are even prizes to be won
just my 2 cents
www.northernquarterpb.com (for directions and site info)
P.S. lifts are also available to and from the airport