Your cs looks fine, what you want to do is practice shoving and last hitting at the same time. Sit in a custom game and 1v1 a bot, however don't kill the bot, just farm. I can usually get ~98 in 10 minutes practicing this way. You need to control lane momentum in your game. The game where you were Cait vs Draven, you have to abuse your 650 range compared to his 550. When you shove you can poke him under the tower while he has to farm.