Ever had a question about Linux but felt too afraid to ask? Well now’s your chance, ask any question about Linux, no matter how noob or repeated it is, and I and others will help answer them.
Previous noob question thread: https://lemmy.ml/post/14261893
i’d suggest starting by finding out what package in your distro actually decides where audio goes - mostly it is pulseaudio (older) or pipewire (newer).
depending on the details of how your distro and the dongle work, it could either be a simple "pactl set-default-sink ", or a more complicated set of udev rules or pipewire/wireplumber scripts.
note that distros using pipewire still often support a lot of pactl commands, so it may be worth looking at the simple option even when not using pulseaudio.
They can also use pavucontrol, whether they use pulse or pipe, for a GUI to select default audio interface as well as easily switch apps to different outputs if needed