While the frontpage doesn't go in depth, the docs quickly do: First with https://docs.iroh.computer/what-is-iroh and then following up with the how it works section. The docs are actually good from what I can see so far. From what questions you brought up so for it seems to answer them pretty quickly.

▲ sva_ 5 hours ago | parent | next [-]

The doc still doesn't show what such a 'key' looks like? Why can't there be a simple infographic that goes like

    127.0.0.1 -> 'key'

	▲	morphism 5 hours ago \| parent \| next [-]
		The info graphic shows the flow in `What is iroh?`, and quickly looking at the endpoint area you can see what the key is: https://docs.iroh.computer/connecting/creating-endpoint#pers... It might be the docs just mesh with how I think about things. The creators should expand on this, since people seem to not mesh with the current info.
	▲	asdfaoeu 4 hours ago \| parent \| prev \| next [-]
		It seems to use DHT under the hood whether directly or through a relay. https://pkdns.net/ .
	▲	andrewflnr 3 hours ago \| parent \| prev \| next [-]
		They mention later on it's an Ed25519 key.
	▲	5 hours ago \| parent \| prev \| next [-]
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▲ andrewflnr 3 hours ago | parent | prev [-]

I'd quibble with "quickly", but sure, this seems like the starting point for figuring out how it works: https://docs.iroh.computer/concepts/endpoints From a marketing standpoint, for a technical audience, I think it should be quicker.