I need some tips for playing ADC

Hi, I have been playing league for awhile now (since season 1) and mained every role at some point or another except for ADC. I have never been able to "git good" at the role to where I feel comfortable playing it in ranked, and I want to change that this season hopefully with your help. The ADC's that i'm interested in from an aesthetic and kit standpoint are Jihn and Tristana any advice you could provide would be appreciated