The first and biggest thing for it is farming. Go into practice mode and just practice farming waves as your favorite champion, using only basic attacks, both last hitting only and trying to push the wave. Learn wave control and learn how to CS. Those are things you can transfer to any role and any champion (except for jungle and support, but they have their own gold and don't need lane CS).
Also good to learn is the Auto Attack button. You'll be using that instead of right clicking for a lot of your basic attacks. By default, it's A. You press the button and then left click and you will attack the nearest target in your range. It's also a movement command if you don't have anyone in your range, so say you're going into a bush and you think an enemy might be inside it. If you auto attack into the bush, you'll walk into the bush and then immediately shoot an enemy if one is there, whereas using right click would leave you just moving into the bush to get surprise butt-sexed.
If you want someone to tutor you instead of just giving tips, I would say to get someone who's higher rank and an ADC main. As it stands, I'm a jungle player who is only in silver 3, I just know all this because I've been playing for a long time.