can yo help me here - open to bidding

hi im very new to this freelancer. so can yo plz help me to work in this site. i dont know the procedure. i simply registered here and doing something worthless. but now i completed a course on iphone application developer. so i wanna make some application which is very useful to all. so guide me how to work on this website plz....i wanna earn money for my family needs plz...and sorry to communicate through this i dont know how to contact yo...