I can help you get set up on Windows (just 10, not 11) with Python 3.x and Visual Studio 2019.
where are you stuck?
the source and images for that page are at opencv/py_setup_in_windows.markdown at master · opencv/opencv · GitHub
would you be willing to submit a pull request with changes to these files? you’d be the best qualified because you (will) know exactly what’s needed to make it work.
alternatively, stick to python, pip install opencv-python.