The most practical way to learn DevSecOps is to build a small pipeline yourself and add security to it one layer at a time. Reading helps, but the concepts make sense fastest when you see a scanner block your own build.
- Learn the DevOps basics. Get comfortable with Git, a CI/CD tool such as GitHub Actions, and containers with Docker.
- Learn common vulnerabilities. Study the OWASP Top 10 so you know what the tools are looking for.
- Add scanners to your pipeline. Turn on free options such as Dependabot and code scanning in a personal GitHub repository, then try a container scanner such as Trivy.
- Practice fixing what you find. Work through the findings, decide which are real, and fix or suppress them with a documented reason.
- Study the wider process. Read the OWASP DevSecOps Guideline and learn how larger programs prioritize and track remediation.
The fourth step is the skill that separates practitioners from tool operators. Knowing how to judge exploitability, prioritize by business impact, and get fixes shipped is what most security teams are hiring for. The Seemplicity blog and Resource Center cover that side of the work in depth.