There are some assumptions going into this video for the viewer but happy to help further beyond that. You can open the terminal in a few ways but the quickest is by keyboard shortcut in VS Code: CTRL + ` (on Windows/Linux) or CMD + ` (on macOS). Hope that helps and let me know if you have more questions.
Sorry to hear that. To make sure I understand what you mean by step one are you referring to the Getting set up section at 00:27 ? And in particular is it the npx part? Let me know as I'm happy help you get past where you're stuck.