>>websku+(OP)
I just use Proxmox on Optiplex 3060 micro. On it, a Wireguard tunnel for remote admin. The ease of creating and tearing down dedicated containers makes it easy to experiment.
>>RicoEl+ip
I too have that same Dell Optiplex 3060 micro. I love it for experimenting also. Also use wireguard for remote access. I use incus for my Linux containers, preferring it to proxmox.