some questions/ virt-manager/ proxmox/ debian

I am going to redo my server from scratch. I installed virt-manager hoping to build it in there and keep setup guide/notes for myself for when i move it to the server pc.

Im not fluent in linux speak so bare with me.

Does anyone know how I can reach the proxmox IP when its in a vm set up with virt-manager? I installed it with the default network adapter setting and it gave me 10.0.2.15 for the ip. I couldnt reach it from the main system or a debian vm. I deleted both the proxmox and debian vm's and will try again. Should I be using a different network mode in virt-manager? is it even possible to do what im trying to do?

I want to try out using proxmox with a debian vm instead of baremetal omv for docker. I was also thinking about using a VM of omv for my storage drives.

anyone have input on this stuff? I saw docker has a desktop app that seems pretty good so I was going to try that. Or would it be better to just install debian without a DE and use docker from the command line?

should i just use debian for the drive shares too? should i stick with smb?

does it even make sense for me to use proxmox? I figured it would be easier for me (personally) to keep things backed up. I like the idea of being able to create new vm's to experiment with without breaking my main/only server.

Thanks