After some diving for info on Python GUIs, there are several that pop out as front runners for the first experiment... most notably PySimpleGUI.

They recommend having the logic encapsulated in functions and bypassing direct user input with widgets that will ensure the proper range and values. Already done! The current functions are atomic and ready for use.

There is a great tutorial about also including matplotlib in the code to make graphs on the fly... even better!

Then there is kivy, a Python library I can use to make things mobile! That one is for later...