The person willing to begin creates possibilities spectators never encounter.

Beginning does not just advance the project, it generates a set of encounters that only exist for participants. People you meet, problems you find, options that appear once you are inside. Spectators are not just slower, they are in a different environment with fewer doors in it.

Start something small enough that failure would be survivable. The value is not only the outcome but the possibilities that become visible once you are actually moving.