Here’s a nice straightforward way to contribute.
The Ubuntu Wiki has a ton of pages which reference freenode irc. As you may know, we’ve moved from freenode to libera.chat. If someone (or a group) have a little time, it might be useful to just ninja the pages which point to the freenode pages, web chat and channels, and update them to the new libera chat resources. This will prevent signposting the wrong place to new users.
I have a local copy of the most recently edited pages on the wiki (don’t ask, long story). I just checked and there’s only around 100 pages which have been edited in the last 3 months which reference freenode. There’s a list here: https://paste.ubuntu.com/p/q9cjQqRNp5/