Get Rid of Acne (14 years old) in 8 weeks?

I'm 14 years old and I need to get rid of my acne (in 8 weeks preferably). Are there any effective products or methods or mixtures I myself can do and if so, PLEASE tell me. Do I wash my face everynight or take 2 baths a day or when I'm washing my face do I use warm water to lather and cold water to wash/rinse? PLEASE HELP!