What comes after testing?

I know how to write code and how to write unit tests. But that’s all I know. Everything that comes after that is extremely vague to me. The words “deployment” “ci/cd” “integration tests” “tickets” are extremely intimidating to me. I know what they mean, but I don’t know how to do them. When I search for these terms, I get generic explanations. I want a tutorial that shows me every step between testing and deployment. I know it differs depending on the company, but seeing one example of how it’s done will greatly help.