Learn
You do not need a course. Install the editor, look around, ask it to plan a small change, then check the result in the browser that is already in the window.
Pick the build for your machine. Windows, macOS, and Linux are all first-class.
Five minutes on the activity bar, the editor, and the command palette.
Open the AI panel, connect your model key, and let Plan mode propose a change.
Open the built-in browser next to the code and see whether the site does what you meant.
The useful part of an agent is not that it types faster. It is that you can see the plan, accept the diff, and then check the result in the same window. Web testing is what you can do today. API, desktop, mobile, performance, and penetration testing are the same habit, still being built.