This will be open indefinitely, so join when you can.
I wish you the best of luck, but don't have high hopes. The time to start a corporation was back in 2012 when the game was really hype. Coincidentally, it would also have been the best time to have started a MLP-themed corporation (Amarr ftw) as the show was at its height. As it stands those of us on /mlpol/ have too many responsibilities to play an autistically-demanding game like EVE, and those that already do are probably part of a corporation they don't want to leave.
It's a cool game of course, but I prefer something more casual. I'm waiting for Starfighter: Infinity to release.