The words that come to my mind are nascent and infancy.
definition: just coming into existence and beginning to display signs of future potential.
The nascent stages of Andy's career proved to be challenging, yet he
came out with flying colors
definition: the early stage in the development or growth of something
The well established company has nurtured "Speak Up" culture right from its infancy.
I wanted to post this as a comment but I don't have enough reputation to do that. So posting it as as answer.
Edit: : Edited answer, added definition and usage to be in line with the answer style guidelines of this community