Rat or not - that's the question

Hey :)

First off, I suck as ADC. I'd say I main Supp, Jungle, Mid and even Top but as ADC I'm Wood V (well, i can play corki a bit, but that's it ^^). So by coincidence I remembered Twitch, the filthy, sadistic, toxic rat and found his skillset and playstyle pretty cool. So my question is: What do you think, am I, with an ADC-suckeritis, who even struggles with playing someone like Ashe, Tris and Sivir, able to learn/have fun/be successful with Twitch? I thought he could better fit my playstyle by being a stealthy, assassin-like long-range-DoT-dude.

Pls no answers like: Man, 2 roles r enuf. Go play ur supp or whateva., because it bothers me that I can't play any ADC well. And - to give it a touch of pathos - my passion is to play as many Champs and as many roles as I can in League of Legends, even the ugly, stinky, toxic ones like Twitch. Everyone. Even Ur... Oh, well, not Urgot.