110
Adding PieFed/Lemmy to lists of privacy options could raise awareness of its existance
(media.piefed.social)
A community to organize and discuss the growth of the fediverse as a whole
It would ensure that yes. The other instance would only see the IP of your instance, not browser information or anything else. I haven't tried selfhosting, so I can't speak to it's difficulty, but as far as I know, there is no reason to distrust any of the major Lemmy or Piefed instances. I'm not an expert and it is open source software so anyone could theoretically edit the code if they wanted.
And privacy refers to having control over who can see your personal information, anonymity means being unidentifiable.