Some small questions

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I heard of PyQT5. But didnt you have to pay for it? If i remember correctly.

There a two version PyQT5 and Qt for Python,the are mostly similar excepts license.
PyQt5 is released under the GNU GPL v3 and Qt for Python is available under the LGPL v3.
The difference is that with LGPL v3 don't need to share the code used,with GNU GPL v3 most share code.
For use commercial the both are under Qt Commercial License which cost 550$ for one year.

Kivy as mention also look into wxPython(which is strong GUI and no license problems).

Something PyCharm has done, but i also think Visual Studios (not VS Code) also have it?

Just a advice very few in Python use Visual Studio,VS Code is much more geared against Python.
Have Thread here VS Code from start.