If you’re having specific issues that aren’t directly related to the original post here, I would suggest you open up a new topic as to not potentially confuse the conversation. (On the other hand, this is a nearly-three year old thread, so there’s not a lot of chance on that - other than the people who have previously responded to this thread may get notified of the new message on it.)
However, I will briefly point out that based on FAQ: Installation | Django documentation | Django, Django 4 doesn’t support anything earlier than Python 3.8. You’ll need to install a newer version of Python and will want to set up a new virtual environment to use Django 4+.