if your just getting your feet wet.
i suggest watching some videos on youtube.
you might want to try proxmox os to load operating systems onto.
i got my feet wet with microsoft virtual software(MS VPC) then used software from Vmware called vmware workstation
now there is virtualbox from sun that runs on many different operating systems
but if i wanted to run two sme servers on one box, i would try proxmox, it is free.