Or you could read man pages, ask people for help, read books... all of which are more closely aligned with self-hosting than outsourcing the whole process.

I agree you could use LLMs to learn how it works, but given that they explain and do the actions, I suspect the vast majority aren't learning anything. I've helped students who are learning to code, and very often they just copy/paste back and forth and ignore the actual content.

I mean, how do I expose my home server to the internet, without relying on externally hosted platforms like Cloudflare or Tailscale? While still minimising the risk of DoS

I spent so long trying to make Raspberry Pis work but they just kind of suck and everything is harder on them. I only just discovered that there are an infinite supply of these micro desktops second hand from offices/government. I was able to pick up a 9th gen intel with 16gb ram for less than the cost of a Pi 5, and it's massively more powerful.

What's the power consumption on those?

I'm not familiar with Dell product names specifically but 'tower' sounds like it'll sit there burning 200W idle. Old laptops (sliding out the battery) is what I've been opting for, which use barely anything more than the router it sits next to. Especially if you just want to serve static files as GP seems to be looking for, an old smartphone will be enough but there you can't remove the battery (since it won't run off of just the charger)

I forgot all about these after I stopped doing desktop support, thanks!

That's twice what I'd spend on a first server when you're still figuring out what you need!

My first "server" was a 65€ second-hand laptop including shipping iirc, in ~2010 euros so say maybe 100€ now when taking inflation into account. I used that for a number of years and had a good idea of what I wanted from my next setup (which wasn't much heavier, but a little newer cpu wasn't amiss after 3 years). Don't think one needs to even go so far as 200$ for a "local Bandcamp archive" (static file storage) and serving that via some streaming webserver

Jellyfin docs do mention "Not having a GPU is NOT recommended for Jellyfin, as video transcoding on the CPU is very performance demanding" but that's for on-the-fly video transcoding. If you transcode your videos to the desired format(s) upon import, or don't have any videos at all yet as in GP's case, it doesn't matter if the hardware is 20x slower. Worst case, you just watch that movie in source material quality: on a LAN you won't have network speed bottlenecks anyway, and transcoding on GPU is much more expensive (purchase + ongoing power costs) than the gigabit ethernet that you can already find by default on every laptop and router