How to activate an existing virtualenv projects?
Open your Windows Command Prompt.

Go to your project directory, where you created your virtual environment for this project.

run this command->  .\env_name\Scripts\activate
I'm a beginner to Django and Python, and I've never used virtualenv before. However, I do know the exact commands to activate and deactivate virtual environments (online search). However, this learning course takes time and sometimes I need to split the work over 2 days.
When I create a virtualenv today and do some work, I'm unable to access the same virtualenv tomorrow. Even when I navigate to that folder and type in .\venv\Scripts\activate, it says "system cannot find specific path".
How can I open already existing virtual environments and the projects within them? Could it be that I need to end my previous session in a certain way for me to access it the next time?