Ask HN: From Back-end developer to DevOps engineer?

Hi, any advice on transitioning from back-end Web developer (Node.js) to DevOps engineer ?

Already have the entry-level AWS certification for what it's worth.

What are key skills regarding DevOps that are not typically asked from a developer ?

What tech to learn to be credible (I know basic Bash scripting and did some Go, on top of years of Node.js services and APIs) ?

Java / Python seem to come up often in positions where I'm looking ? Also, notice less focus on languages and more on processes.

Thanks