Okay, I will stop worrying about it, hehe. We have a public garbage bin (I'm living in a dorm) so if I screw up, they won't know it's me anyway. Which is good, because I've heard Japanese housewives can be scary about it...
Anyway, thanks for all your advice!
It's a very good idea, but the execution is a bit complicated (a la typical Japan, it seems). <333