as a Noob I have a few questions regarding the installation process - I passed now OpenCV:

At first for me it looks like this is the newest face recognition module and therefore I should go for installing this one instead of the other 2 options, right?

Now I finished the OpenCV installation by using the linked guide from pyimagesearch. There OpenCV was installed in an virtual environment. Is this important? Do I have to install all the libs like dlib or face recognition also in this virtual environment?