Is corki good mid and how to play him?

So because of the new gunblade build,i decided to pick up corki. Ive been having a blast playing him . He is so much fun! The only thing is im not too sure if im good at him... is it because hes not viable atm? i haven't played him a whole lot so maybe i just dont have enough experience.

Are there any good corki players that wouldnt mind adding me and teaching me how to play him?