Ask HN: How to impove in CI/CD

CI/CD concepts are crucial parts of each not-so-small software project. Proper automation and consideration of probable issues support team through the whole journey.

I've seen companies ignoring it or doing it wrong in their concrete case.

I want to improve in this domain because DevOps quality is correlated with a company's success (defines processes in so many ways).

What is the best way to acquire practical knowledge in CI, CD and DevOps? The historical perspective could also be super interesting!

Thanks