Welcome to the forums!
If you are on Windows, I’m assuming you mean you downloaded Git Bash or Cmder (since Cmd already comes with Windows). In order to set an alias for
sqlite3 for either of those, follow the written instructions at the link in your post and make sure you are typing your path correctly and not just copying and pasting (the newest version of SQLite is going to be
If you still need guidance, check out my answers here, here, or here.
Or, if you’re not comfortable with the command line it is probably better to just download and use DB Browser for SQLite. It’s better for database exploration anyway.