Rnault Megane Wheel Bearing ?

I have Renault Megane 1.6 RT Sport 1999 and is making a whistleing noise coming from driverside front wheel, so take it that it is wheel bearing gone have bought a new one so now need it changed. I am female can't afford to go to garage and don't know anyone that could do it for me so will have to try and tempt it myself, so please could you tell me how to change it please.