Do the thing, feel fear. Do the thing, feel whatever you feel...
Do the thing, feel fear. Do the thing, feel whatever you feel. Do the thing.
The emotion is a requirement to know that it matters and if you can't wait for the emotion to disappear before you commit, then there's nothing to commit to. In fact anybody who's had an operation in the part of the brain that takes away emotion is incapable of making any decision.
They literally render themselves incapable of even, for instance, deciding between which type of chocolate. Emotion is a requirement for commitment. Without emotion there is no commitment, so people say, "What if my fear is to disappear before I join."