Yeah there is just so much choice now with Linux audio, all of those above are good for beginners. My son regularly uses Guitarix and hydrogen when he is working on something new, before the band get together with the real hardware. Ardour is a great introductory DAW that people can learn before they move on to something like Reaper or pro tools.
With the introduction of pipewire as well recently, the whole Alsa, jack, pulse nightmare is rapidly looking like a thing of the past.