I need help.

So, hello everyone. It's been a long time since i actualy posted on the boards of league, i usually post at concepts and creations for champion concepts and yes, i do have a new concept coming up very soon(HINT:think of a new version of ranged and melee together). So, back to the point. I've started feeling like im trapped in this game without knowing an efficient way to make it fun or to even learn how to climb. I cant stay stable on a champion and i always play different champions. I dont know who to play so i can stay consistent and have fun at the same time...So i came to the boards for help. If you have any suggestions for ANY lane, that would be really helpfull, but i would also like details on that champ please.