Once you take the first step, the next step will be a little easier. And the next step after that will be even easier. And before you know it, you'll be well on your way to achieving your goal.
The proverb ‘A journey of a thousand miles begins with a single step’ is first found in the Tao Te Ching, which is a classical Chinese Taoist text usually credited to Laozi (a.k.a. Lao Tzu), and probably written between the 4th and 6th century BC. The original text is: “A journey of a thousand li [a Chinese mile] starts beneath one’s feet”