@winxpto10 You can use just about any OS in VirtualBox regardless of the host OS - just as you can with VMWare, Hyper-V or even KVM...
Its a virtualization platform - You can have multiple - I have Win2012, CentOS, RHEL and Ubuntu servers running in mine.
If they require a license, you'll need or register/use accordingly..
Depending on the Host hardware will decide what you can run at once...
If you have a 4 core and 30gb of ram, you can probably get by with 3 or 4 at once (small VM's - 1vcpu 4gb ram)
but if you need beefier maybe 1 or 2..... cause the Host will need cycles too..
You should get a pop up about resources as you spin them up, if you're over committing...
