How do I make a step-by-step GUI Layout with Tkinter Python 3.7? What I mean is that I want to have the user enter some information, press the "NEXT" button and enter some more information, etc. I don't think there's really a feasible way to completely change the layout like this with Tkinter, so I'm hoping there's something I'm missing. How do I do this?
I don't think there's really a feasible way to completely change the layout like this with Tkinter,

That is incorrect. This is trivially easy with Tkinter. Create a function or class for each step. All of the widgets for that step should be inside a single frame.
You then just need to call the first function or class to create the frame. When the user clicks "next", destroy the frame and create the next frame. And so on.
Step-by-step tkinter GUI layout