Ask HN: DevOps engineer taking programming sabbatical

I've 10 years of experience with infrastructure, lately focusing on cloud and Kubernetes.

I'm doing well with all the configuration management knowledge but my programming skills aren't fluent enough for a SRE role, a-la Google. I discovered that in recent interview.

I can reduce my work week from 5 to 3 days, leaving me with 2 days plus weekends to focus exclusively on programming tasks. For one year.

What should I focus on, considering my target is 100% Backend Projects?