Bronze Sup main LF team/duo

Hello all! Simple here! I've been playing league since season 2 and have been bronze I think every season I've played (never put in serious effort until preseason where I got to silver 3). I main tank supports mainly Leona, Braum, Thresh and i delve into most others. I am serious this season and want to get to my full potential. I am willing to take constructive critism and have coms (discord, skype and TS). Thank you for your time.