Hi Walter,
these are good starting points to get into the depths of IPFS:
This is where it basically started ~ 2014/15:
It’s like torrent, https://cobox.cloud/ or http://dat.foundation/, but slightly different.
You’ll see how it’s useful for immutable data. IPLD then is a metadata language used in IPFS for itself and to bridge to other networks. https://ipld.io/
With it we get nice things, such as: