I'm not sure what you mean by 'using the OOC too much,' but I think the only real mistake you made was just not starting it. It looks like it was just bad timing on your part, since not long after starting it you ended up being busy, which is understandable, but it's much easier to slow down a RP once you've already gotten it running. Delaying the first post will just make the RPers lose interest. I would say just make sure you'll have the free time to at least give it a good head start next time.