The best way to contact me is on email.
sandra.snan@idiomdrottning.org
I do sometimes block senders but I’m slightly less trigger-happy with the blocks on email so that’s a good way for appealing blocks I’ve made elsewhere.
Email is the best and politest way to reach me. If you’re like “what app should I use to ask Sandra something”, that’s email.
But just in case…
I am on Fedi almost every day at @Sandra@idiomdrottning.org
I am sometimes on IRC. Not every day, but I pop in from time to time.
I am sandra on OFTC, Libera.Chat, Akkoma.Dev, and tilde.chat.
My XMPP is sandra.snan@idiomdrottning.org (same as my email). I have OMEMO on there.
You can also talk to my IRC account from Matrix through their bridge to OFTC. My username there is @_oftc_sandra:matrix.org
If your Matrix instance has an email bridge, you can also use your Matrix app to talk to my email app.
Encryption doesn’t work through those bridges, so I have a real Matrix account also but I use that very seldomly or by appointment.