All jokes aside now...the two biggest things you need to keep in mind with ADC is CS and positioning.
I stopped playing adc for the most part tbh, but I main both halves of bot. As adc, your right click is pretty much binary, free damage on demand...but you have to stay safe to supply that damage, and you need a boatload of gold to supplement yourself with items to make it matter. You're only going to get the positioning part down with practice against other players...but you can improve your cs game by simply playing against a bot and focusing on nothing except cs.
The maximum cs you can get by 10 minutes is between 107-114. If you're looking to improve your cs with a (1v1 custom) bot game method, aim for having no less than 100 by 10m (without offing the bot...the bot is simply there to imitate poke pressure). Against a bot, it should be more than possible...right? :P
this will help your farm game become almost automatic once you do it enough times, you will know your last hit potential, and if you feel like adding to it, there are a couple other things you can throw in such as not buying items to make last hitting more difficult, or alternating between last hitting one wave while hard shoving the next.
This is probably one of the few things custom bot games are good for, and I can promise you it will translate to better cs in games, meaning faster power spikes and a good chance to push an advantage.