Hikuro - what a HUGE undertaking you have begun! And amazing results so far!! I wish you and all your VA's good luck. You have many fans already, eagerly awaiting your 'production(s)'.
As an aside, years ago, when I first discovered Star Wars fan audio dramas, I debated applying for a role, but decided that I might not have the time, or more critically, the 'acting' quality I would want to listen to, let alone know that others are listening too. Maybe some day I'll find a tiny role to 'play' (as a test to see if I like doing that sort of thing).