I tried the ubuntu lastest image, but don't know what user and password use to log into. Any idea?

If you just need Ubuntu then you can try "Multipass" from Canonical (https://multipass.run/). Works quite well on my M2 Air. I haven't tried using Linux GUI with it though as I need only terminal based VMs.

creativity, should be user ubuntu pass ubuntu

I have tried user ubuntu with ... empty , pass, ubuntu. None of them works.

admin/admin worked for me

Thanks! working now