Ask HN: What should I use to write native desktop apps for Ubuntu?

I am computer science student. And I want to write a native desktop app for Ubuntu which will be displayed in the system tray. I tried building a sample app using ElectronJS but it compiles to very big file size for a hello world system tray app. I have looked into GTK and Qt but I am confused which one I should use. I want to know which one will be easier to pick up and get going.