Usefull Kubernetes skills?

Fellow Golang developers,

I will be joining a Kubernetes (provide Kubernetes + Puppet cloud to the company) project for a while (mid to long term).

As a Golang developer in my 30s, who wants to keep working as Go developer until retirement, what skill could I learn from this project ?

As far as I understand, they do a lot of things Kubernetes/Puppet/Prometheus/Kraken related, but it is a large project thus it is unlikely I will understand everything. And most important it will be my choice to decide in what sections I will help them by writing go code (at least I was promiced that).

So, what Kubernetes related knowledge will help me in my career ? Any tips here ?