TOP Laner LF coach

So, I took a break from league that lasted about 1 year since my laptop broke and I couldn't get a new one until recently. I am currently enrolled in university and got a free macbook pro, which I am using to play LoL. Anyways, it's been about 3 months since I started playing again and I believe I am playing as I used to play before, but now I want to become better. I want to reach a high rank which I can feel proud of and join a good team so that I can participate in tournaments. To make this short, I need a coach to tell me what i'm doing wrong and how I can better it.

IGN: REDNomad Lane: Top Best Champions: Trundle, Renekton, Fiora, Irelia Things I know I need to work on: AP Top champions and farm. (I normally get about 60 farm by minute 10, and about 140 - 160 by minute 20)

Thanks