Installing Python 3.8.11 from TGZ File

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Why are you trying to install 3.8.11?

Python 3.8 isn't receiving regular bugfixes anymore, and binary installers are no longer provided for it.
Python 3.8.10 was the last full bugfix release of Python 3.8 with binary installers.

Python 3.8.10 has installer,so use that.
Building from source is not so easy on Windows,so should try to avoid that.
Now should use Python 3.10.12 or Python 3.11.4.