Nighblue3 is a really good twitch streamer that i enjoy and even though im not a jungle main i still learn a lot from him. He explains a lot but if you WATCH him, you learn a lot too. I don't watch anyone else, so that's where i leave you. Don't stay in bots, it's a mistake i made b/c the first time i played pvp i didn't know what champs did and i played janna support with my friend. Enemy thresh(had no idea who or what thresh was) hooked from a bush and dragged a minion in with his chain. I about shit myself. My brother started pvp before me by a week or two and he was much better than me for quite a while.
League takes a lot of practice. I've been playing two seasons almost and my mechanics are still trash. Just tough it out. You will get better :) What champions, roles, do you like??