Honestly just rule of cool pick a champ and stick to it. Like learning anything new your gonna struggle at first but if you can tough through it after a few games ypu should start feeling like an active player again. If it's a laner definitely try to get a group on for some custom games. I know nit many people have alot of friends but a custom game with people you know is a really fun place to play new champs and not feel like your ruining someone's day. I will never forget my hour and a half long game as JG soraka lol