I would like to reach diamond one day

Hello,
My name is Mike, I have been playing league since season 1. I have tried to improve my skill set in every role since season 1. The highest i have climbed is silver 4. I focused more on learning each role rather then focusing on 1 role to climb with. Before league i was a DOTA player with a high skill cap. Do to u fortunate circumstances i lost a considerable amount of skill. I can explain that in more detail if someone would like to know. I play league on a pretty regular basis in solo que. I prefer playing with teams or friends but I am currently short on both.