I'll be available ! I can propose a few topics which I worked on recently, I'll prepare one based on interrest:

Complex backups with simple tools

How I use tools like tarsnap, dedup, rclone to backup my data, be it encrypted password stores, raw data (pictures, videos, ...) or emails. Everything is backed up on remote "clouds" , so everything must be encrypted and compressed, for privacy and $$$. Backup encryption is interesting, because you must ensure that you can decrypt the data even if you loose everything (including any eventual private keys...).

Automatic configuration with drist(1)

The server hosting the gopher server at g.nixers.net is deployed using drist(1), a configuration management ala ansible. I use it to add new users, create directories or push static files, as well as configure and start services.
I would detail the whole process of setting up the server, from bottom to top !

How I try reallly hard to only read emails

My email setup got somewhat complicated over the years, to adapt to the clusterfuck that "modern" emails are today. I read my emails in mutt(1), and I want all of them to display nicely in a terminal. For that, I process emails (mostly HTML ones) to display them nicely, reflow them to the terminal width, extract links, optionally shorten them (using a local URL shortner), and so on. It doesn't look like much, but there are multiple stuff involved like URL shortening, find(1), mblaze(1), ...

Also, I would love it if someone using plan9 would showcase how they do stuff (edit/commit code, read mails, ... what else can you do?)