Sharing my views , seniors can correct me.

Python

(It will give max advantage i believe, it's programming language as well so I can say I know programming as well, If I want to switch to data science, ai ml or any other field then it can help me, I know basic of it and find it interesting)

Go

(It will help me in understanding Kubernetes in a better way, again programming language so It will be amazing to have skill, don't know much where it will help me but yes, I haven't learned this ever so I will be excited for this)

Shell/bash

(Core skill listed in almost every devops job but again I feel like it will be truly limited to automation and I don't find it very easy to learn, very weirds and long braces, dots and what not )