Searching for help to reach higher elo!! (Diamond 5 at the moment)

Hello Guys

As the titlte already says I am looking for someone to help me. Basicly I'm playing around diamond 5 and diamond 4 but thats about it. I'm not getting matched with lower elos or higher elos so i got a solid mmr. My problem is my current playstyle holds me in place but I am not getting higher elo so i need someone about diamond 1 to telel me how I can step up my game. About me I am an allrounder but I prefer the midlane, especially Zed. But I like to fill for the team. I do not have that much time but the time i have I want to investigate to get better. My main goal is to reach diamond 2 or more so i would be glad if you would help me and add me ingame for mroe informations: Lateon Thank you already for all who are reading this post^^ Best regards Sebastian