A few big topics need a real computer rather than a browser, or are big enough to learn as their own subject. When you're ready, these are the next things to look up:

Topic	What it's for	Start with
Packages and virtual environments	installing other people's code safely, one project at a time	`python -m venv`, then `pip install`
Concurrency	doing several things at once, like downloading many pages	`asyncio` for waiting on the network, `concurrent.futures` for spreading work out
Version control	keeping every version of your code and working with others	git, and a free GitHub account
Command-line programs	programs you run with options, like `python tool.py --verbose`	`argparse` and `pathlib` in the standard library
Talking to the web	calling web services and reading what they send back	requests, plus the JSON you met in Unit 38