How's the Funtoo installing by Virtual Machine instead of by USB

I just in the gnome Box/Virtual Machine with 2GB RAM 17 GB disk, at the mount to /mnt/funtoo step but then drop back feeling it's better to ask first here
https://www.funtoo.org/Install
How's or is it simply doable to install Funtoo via installing inside Virtual Machine in place of USB ?

Please help me give the realistic useful answer