Professional data scientists: did you overcome the feeling of never knowing enough? If so, how?

Hello!

I'm a junior data scientist, been working in the field for about a year after getting a professional master in this topic.

I work for a small startup, which means that I have no mentor and I have to figure out shit on my own, as well as deal with everything that is data related (not just data science, but also engineering, ETL and what not).

It's fun and challenging, but also at times very frustrating, because I have this constant feeling of never knowing enough, and given the complexity and depth of this field, and the pace at which it develops, it is really overwhelming.

Also, coming from a business / economics background, my math and stats skills are not exactly razor sharp.
I compensate by being a massive nerd, so I learn stuff quickly, but that's about it.

Advice?