For the personal questions, @rimu@piefed.social is probably the best person to answer them.
For explaining what PieFed is in a succinct way, those links can maybe help
- https://joinfediverse.wiki/PieFed
- https://join.piefed.social/features/
- https://piefed.social/community/fediverse/wiki/piefed-overview
I'm a regular poster on !fedibridge@lemmy.dbzer0.com , and what I've observed over time is that most of the people don't really care about the platform or how it's run. They are just looking for an alternative to Reddit. Nowadays I just point to https://piefed.zip and let them have a look by themselves.
The UI is similar enough to Reddit that they can figure it out on their own : https://lemmy.zip/post/47438646