Okay I will look it over but my first and foremost suggestion would be to stop using the Designer as it does not produce quality code nor even code that is inline with how pyqt ought to be coded -- in a nutshell it is a fairly useless and poorly designed tool -- kind of like using a sledge hammer to drive a finishing nail it just either creates a big mess and/or requires extreme effort.
So basically what I will have to do is go through and rewrite your Designer code and show you how to proper way to write a pyqt GUI using the Layout system from here you might just be surprised how easy it is to figure out what to do and where to do it. Try to get it up a bit later today. I have done this a few times before, and the biggest time delay is usually deciphering the Designer's garbage code.
Lastly welcome to my classroom ;) -- oh and I have a Discord Message Server where I can be reached to help with python/pyqt if you are interested and/or have Discord available to you
So basically what I will have to do is go through and rewrite your Designer code and show you how to proper way to write a pyqt GUI using the Layout system from here you might just be surprised how easy it is to figure out what to do and where to do it. Try to get it up a bit later today. I have done this a few times before, and the biggest time delay is usually deciphering the Designer's garbage code.
Lastly welcome to my classroom ;) -- oh and I have a Discord Message Server where I can be reached to help with python/pyqt if you are interested and/or have Discord available to you