Take a look at adult production company listings or one of the adult staffing web sites and start your research from there.
I started working for a porn production company here in the UK about eight years ago and quickly realised that it was hard work,yes fun sometimes but very rarely a sexual situation,with camera men,assistants,photographers and make-up artists all there.The heat of the lights and the pressure to perform to a high standard every single time with a stranger whom you may not even find attractive made the novelty of it all wear off very quickly.
I work on the other side of the camera now, the money is better and the work is far more regular.
I say have a go though,just remember the industry is nothing like you imagine it to be,look after your appearance,ie skin tone,body hair and body tone all count and also remember as has been said before ,you will be the person earning the least money on set and often be the least important person on set,guys can sometimes just be a prop.
All of this is just my take on the porn world and many peoples experiences will differ but if none of this puts you off then go try it and most of all Good Luck.