I've found a lot of docs (Proxmox and TrueNAS are both guilty of this) assume you have existing domain or tool knowledge. I'd recommend checking out some videos

I've found a lot of docs (Proxmox and TrueNAS are both guilty of this) assume you have existing domain or tool knowledge. I'd recommend checking out some videos from selfhosting YouTubers. They often explain more about what's actually happening than just what buttons to select Also, I found TrueNAS's interface a little more understandable. If Proxmox isn't jiving with you, you could give that a try