Check out the following resources based on your OS to learn about virtual environments

Windows:
https://medium.com/swlh/how-to-setup-a-virtual-environment-with-a-different-python-version-windows-4876738e7aa0 
https://www.techcoil.com/blog/how-to-use-a-python-3-virtual-environment-in-windows-10/

Ubuntu:
https://www.techiediaries.com/ubuntu/install-python-3-pip-venv-ubuntu-20-04-19/ 
https://vitux.com/install-python3-on-ubuntu-and-set-up-a-virtual-programming-environment/

Mac:
https://gist.github.com/pandafulmanda/730a9355e088a9970b18275cb9eadef3
https://medium.com/swlh/how-to-setup-your-python-projects-1eb5108086b1