A project is just a folder that holds everything for one piece of work — your .py files, data, and notes — kept together so it's tidy and easy to share.

A simple beginner layout:

my_project/
  main.py        the program you run
  notes.txt      anything you want to remember
  data/          a folder for data files

Keeping each project in its own folder means files don't get mixed up, and later it's easy to put the whole folder on GitHub. Start every new idea as a new folder.