Tips for a new adc player?

I'm not new to this game, I know the basics like, learning how to position, cs, ect. but what are some more advanced tips or something you guys do as an adc player that could help me. As of right now, my cs'ing is ok. sometimes i do perfect and get like 180 at 20min, sometimes i do poorly and have 100 at 20min. And for my positioning, i was actually consider myself to be pretty good at that. I don't run into the enemy team, decide to frontline and facecheck for the team or anything like that. I know that i should just stay back and hit whoever i can in teamfights, but obviously prioritize a squishy or carry if possible. My kiting is kinda iffy. I don't like using the "attack move" (A key) so i'm just moving my mouse back and fourth really fast and sometimes i fuck up.

During laning phase, i can harass and keep up in cs pretty well (I"m usually beating the enemy in cs if not even 70% of the time). I know how to zone the carry when playing certain champions like Draven by punishing them everytime they go for a cs. I know how to build accordingly. (I should say that i love to play aggressively and almost always go for the level 2 rush)

As for adc that i should learn or play for a beginner? I'm playing Vayne, Kalista and Draven right now. I should probably be playing something easier like Caitlyn or Tristana but whatever, i find Draven and Vayne to be too fun even though i'm not an expert at them. (IMO) Draven teaches me how to position better, and harass in lane and of course juggling :D Kalista teaches me how to kite and dodge skillshots Vayne teaches me how to kite, outplay, and position I'm planning to buy Caitlyn-Tristana-Jinx-Graves-Sivir-Varus in that order sometime in the future. Anyways, thanks for reading, would appreciate it if you guys could help me out!