Help needed converting Python2/GTK2 application to Python3/QT

I have a machine control application involving computer vision. No Machine Leaning or object detection (at the moment) just "taking pictures". This is however an application that controls a "CNC" machine of sorts. This program is currently in a mostly functional state however due to the previous dependence on Legacy APIs it is now unable to be run on recent Linux distros and must be updated. I have already created the Qt GUI but it must be worked into the Python code and the Python2 code must be rewritten to Python3 at the same time. As for the "CNC" aspect of the program it is not much of a consideration. I am familiar with that API and know how to interface it, I am not competent with Python or general programming hence this job post.