The first step gets you started, but it does not get you there. Success rarely comes from a single effort.
The tallest tree begins as a tiny seed. Practically every living thing starts out very small and achieves the full richness of life through steady, sustained growth. Even lifeless things such as storms and rivers, start small and grow over time.
Give your best to the first effort, and then continue for as long as it takes. Success comes with persistence.