Getting Bored but need to practice.

(Silver IV) I main Jungle, and want to get into a team (Silver II - Gold V and one Plat III). They want me to focus on Tanks for the time being. I can play fighters and assassins like Evelynn, but they want me to focus on getting better so I should only play tanks for a month or two. Only problem is that doing so is super boring. I really want to play, but I can never force myself to open the client and get in a game. I did once last week and I didn't feel like I wanted to keep going into a second, third, eighth game. I know what I need to look out for and learn (Mostly when to gank as I am gank shy because I only get a kill 40% of the time before level 6 and end up AFK farming.) I need to become better so I can get on the team. I don't play ranked often only because I fear being put from Silver IV to Silver V or Bronze. Being put in Bronze League sounds like a fate worse than death. And with the changes for S9, I feel like the jungle changes too much.

Help me figure out what I need to do.