I realize this is a very broad question, so to help I’ll mention that my primary experience with any programming language is Python. I’ve looked into C and C++ as well, but I haven’t written much in them; in part because they’re more involved, and in part because I get lost in the IDE weeds with’em (whether choosing an IDE or getting it configured to even get started tbh, but that’s mostly a different topic).
In Python I know there’s an option in Tkinter, and I’ve worked with it to some extent but never got entirely comfortable with it. Maybe it would be best to try making some more stuff with it instead of bouncing around different things, but would that be advisable over something that may be better suited to the task?
If it would be better to stick with it, what might be some things you wish you’d known starting out with GUI programming (whether particular to Python or generally applicable)?
With python there are so many directions you can take.
Tkinter is the built in option.
Kivy is open source.
Kivy MD is a Material Design focused fork of Kivy, but I think it is recommended you learn Kivy before learning Kivy MD?
Textual is a great open source TUI framework, if you don’t mind being in the terminal.
Official website
List of apps that use Textual from one of their developers
And of course QT (which has two variants for Python). I personally rather avoid QT just due to licensing concerns.
Main issue is with most python applications, is packaging for distribution of course. Would love to see python’s packaging problem finally solved in the core distribution, but -shrug-.