Become so capable that old fears lose jurisdiction.

Old fears were formed by an earlier version of you, in a situation where you genuinely could not handle what was happening. They keep issuing warnings on the basis of that outdated assessment, and they do not automatically check whether the assessment still applies. Building real ability is what eventually retires them, because a fear based on incapacity loses its footing when the incapacity is gone.

Take a fear that still governs your choices and ask what it assumes you cannot do. Then look at whether that is still accurate. Where it is not, take one deliberate action that contradicts it and let your nervous system update slowly.