Switching from 4 to 1 My friend group has too many supports and not enough carries, seeing as I've been playing mostly greedy 4s that have sadly gotten nerfed, especially with the loss of XP talents, I have decided to learn pos 1. 

Unfortunately, I have no idea where to begin.

I need to know what heroes to start with and when to pick them.
I need help with learning optimal farming techniques.
I need to learn how to play something thats weak early and strong late instead of the other way around.
I need help in learning how to itemize and proper item timings.