Subreddits are currently only allowed to be created by accounts over 3 days old. We are changing this to 6 days today, in order to make sure we are on a good footing before we open the floodgates.
Sorry for any inconvenience. If you really really want a sub right away, send me a message and I can create it for you and appoint you as mod.
Thank you for your patience as we get things set up properly.