"Art is never finished, only abandoned" - Leonardo da Vinci
"The best time to plant a tree was 20 years ago. The second best time is now." – Chinese Proverb
There are no right moments in real life. Just do it. Making your work public will help you developing 1.0 and stable API. You still can break and change anything you want in your own products. If you are sure your code is used elsewhere, make sure to, at least, keep an older versions.