Courage sometimes means publishing before certainty about reception arrives.

Waiting until you know how something will be received means waiting for information that only arrives after you release it. The uncertainty cannot be resolved in advance, which is why publishing takes nerve rather than confidence. What you are doing is accepting an unknown, not overcoming it.

When you are hesitating over releasing something, ask whether you are still improving it or just delaying the verdict. If the second, set a date and release it. The reception will teach you things no amount of anticipation could.