I know to write python program. But how do I create softwares/apps

Answer 1

You can do android apps with www.kivy.org.

For desktop you can just use tkinter that comes with the language.

If you insist on making executables, there are a few tools, like pyinstaller or py2exe.

Answer 2

I'm not experienced in coding, but in order to create softwares and apps, I think you should learn C++