I use ADB but it's all the same, you go over the list and pick services/apps you don't use and click menu/disable or in my case I need to type in. I'm still trying to figure what Google and Samsung apps I can disable. For example I disabled Google search from first page on factory settings. If I need Google search I open it from browser, same with youtube, since I don't have account. I disabled Chrome, market feedback agent (sounds like telemetry), Bixby (I left Bixby vision for now to see how it works in stores), all syncs apps (I do all backups manually, first to SD, later to computer) etc. But I don't want to give you a list which may disable stuff you need. I'm not even sure what's worth disabling and what's not, it's still work in progress for me. First page list is a good start. Test on something you know for sure you don't need, like kids home, if you don't have small kids.