The shopping and saving!!!!!

Okay please don't laugh but you guys are so confusing me on this whole cvs thing and coupons. I so want to start but the more i read the more confused i get. I want to start but i don't know were to begin.Can someone please explain this to me in plain step by step. I know you would think i could get it but maybe i have read to many blogs and it has confused me.can some one please help me.