It goes something like this: We have an idea for a new business model or a new office construct, and we talk and talk about it all while waiting for the right time to start. The more we step back and asses the situation as a whole, the further we feel we are from where we want to be. The odds seem insurmountable; the path seems longer and more challenging than it did before. But the more we overthink it, the more time that passes by, and the obsessive self-talk inhibits change.
Progress requires steps forward. It will never be easier to take that first leap. Get in the game, and start now; tweak later and grow from experience.