I’ve given this a read.
https://homelabstarter.com/homelab-networking-basics/

Covers the basics, explains them well & technically, and points to “further learning”.

I’d start with learning some networking basics.
Subnets, default gateways, DNS, routes, VLANs.

Then get another computer to install proxmox on.
Learn VMs, SSH, firewalls, basically Linux. Probably VPNs as well.

Then set up a VM and play with docker & docker-compose.

And that’s most of the tooling to be able to self host anything. A VM with docker, set up the docker compose of what you want, boom: done.
Some projects are more of a “full of” kinda thing (like home assistant), which would be its own VM

Yeh, exactly.
And the “dynamic DNS” part handles your public IP address changing with 0 pain.
You either buy a domain (like example.com), or there are free domain name providers that give you a subdomain (like mycooldomain.example.com) of one of their domains.
You then run an additional service on your home server that checks what the current public IP address is. If it changes, it notifies the DNS responsible for your domain/subdomain, which then points to your new public IP.
To connect to your VPN, you only ever care about “mycooldomain.example.com” and never the underlying IP address.

…
As long as your ISP isn’t running CG-NAT of course 😵‍💫

“Frank”, it I don’t think that name is in the same ballpark as you are looking for.

Mumble is fantastic.
I designed and implemented a very complex voice system for an old guild. Like 100 people, 8 groups of 15, group leader’s private chat, priority speech all that. It worked so well, and never failed.
This was many many years ago, to be fair.
I wish it’s positional audio was more supported.

Mumble was awesome. It probably still is, to be fair

Wireshark*

I love cli and config files, so I can write some scripts to automate it all.
It documents itself.
Whenever I have to do GUI stuff I always forget a step or do things out of order or something.

I always think about using nixos. But considering I dockerise everything, I always end up using Debian.
Good old stable Debian

It’s beautiful!
Once you get something running proxmox you will fully go down the rabbit hole!
You will be thinking about k8s clusters, DNS and domain management, redundancy & availability, services for this, that and everything!
Before you know it you will have a rack of 8 servers doing various things, 2 UPSs, a standby generator and a backup 5G wan connection!

Or, you know, as much of that as you want.