I don't mean to be that guy, but if you like your desktop a certain way and want to easily configure it you might want to look into Nix and home-manager, it's difficult to get started but once you have a config that works it lets you set up your whole OS and desktop and lots of apps.
There's Spot: https://github.com/xou816/spot which is a GTK client.
It has limited functionality at the moment but enough to find and listen to music.
No, it uses Google and Brave search.