Everything starts with a decision. We can "think about" doing something or "intend" to do something until the cows home home (or 40 years goes by. Whichever comes first) but until a decision is made, nothing happens. We don't have to have all the pieces figured out (I certainly didn't and still don't!). Many of the pieces will end up changing anyway. We just need to activate the decision 'switch' inside our brain and get started.
I didn't announce the decision publicly until the end of October. Here's the announcement video I posted to Facebook (after a few teaser posts about a big announcement).