buy the equipment and shit, practice. if you think your good enough, apply for a club (send them some of your mixes or something). get experience and shit. money will come eventually. u never know, u might be the next tiesto or deadmau5 lol.
Im a DJ. I bought my equipment and just practiced all the time. Built up enough confidence and skill and am doing house partys, birthdays etc. Haven't build up the confidence to do U18s yet though. lol. If you need any help or got any questions about equip or anything let me know.