As a first language, JS is too much. They would need to learn three languages to make websites (JS, CSS, and HTML).

I’d start with Python. It’s easy to learn, and modern Python gives you the tools to write code that’s easy to read and follow without being too verbose.

uv should make things very easy to setup too. Install uv, then give them a starter repo with the Python version set. uv run should just work after that, no manual venv/conda/etc nonsense involved.