How do you eat an elephant?

One bite at a time.

How do you build a modern, automated, software delivery pipeline?

The same way.

What’s the smallest step you can take today toward improving your software delivery?

Maybe it’s running a linter for every commit.
Maybe it’s using a consistent directory structure in your project.
Maybe it’s improving the way the local development environment works.

It doesn’t matter what it is. Just pick something and improve it.