I'm a software developer with some cyber security knowledge, but very little networking experience.
My main goals for this are private cloud storage for myself, Immulch image hosting that I and a few family members can contribute to, and a Plex server that a small handful of people can stream from.
From my understanding, a mini pc can be plugged straight into the home router and the VLans can be properly segmented using ProxMox virtual bridging. (Unfortunately the ISP doesn't allow my current router to configure its own vlans or any kind of bridge mode). With my current aspirations I can't think of any reason to add switches or other hardware into the mix yet.
I'll also be doing cold storage for backups, if nothing else.
I also want to make sure this plan doesn't have major security gaps.