Regarding building a website

[snippsat]

but why are you advising to reinstall it where as it seems to be installed perfectly please refer attached screen shot for the same.

Because that's one easy option to fix what you didn't do first time installing Add Python 3.8 to PATH mark on.

If not re-install then fix Path as image that i posted.
In your first image it's under System Variables Then Path and edit button.
Now you point to Python path on disk as image i posted.

python version screenshot from IDLE.

You shall do this from IDLE
Only from command line(cmd).
Introduction to the Windows Command Prompt
When you start cmd then you test this:

# Test pip
C:\>pip -V
pip 19.2.3 from c:\python38\lib\site-packages\pip (python 3.8) 

# Test Python
C:\>python -V
python 3.8