HLML VS hypervisor

So I'm working on making a hypervisor for my school. I've looked into the vendors like Proxmox, Vmware, etc. and I haven't found one that will let me make my own GUI. I have looked at pages like this https://rayanfam.com/topics/hypervisor-from-scratch-part-1/ or projects like Bareflank here https://github.com/Bareflank/hypervisor and they don't QUITE seem like what I am looking for, unless I'm just blind. I just want to have a hypervisor that can spin up oh so many virtual machine instances of Windows 10 and accessible in a browser. I want to have the freedom to make my own GUI so I can tailor it to my school's website. The idea is it's just something freshman can screw around with and have the option of spinning up a few VM instances as they please, while keeping in mind a very simple GUI a freshman could figure out. I'm not too concerned with hardware limitations, I just want to see if this is even possible, and if I have to deal with crap hardware/software that can only spin up 2 instances or something, so be it. I understand that I very well may be looking for a unicorn in that I will have to either use a vendor and accept their GUI or go through a monolith of assembly code to build my own, but if anyone has any suggestions or github links to help me do this in a reasonable amount of time it would be much appreciated.