Congrats on making it to 3years! Found a great home here after my previous instance shut down

In discord you can edit messages by sending a subsequent message like this s/old/new

There’s plenty, tuta calendar, proton calendar, nextcloud if you want to self-host ,…

I got it from f-droid, but you could pull it from github as well

Check out Davx5, that’s what I used to pull contacts and calendar