Constructive criticism wanted on ADC

Hi guys, I recently got into ranked LOL, and after going 5/5 in my placements was put in Bronze IV. I was wondering if some of you more experienced players would be willing to give me some constructive criticism on how to become a better ADC. I'm not saying i don't belong in bronze, but i would love becoming better at what i'm doing, especially if it leads to more wins.

Thank you