@detlev, none of those usernames are working. I think that's because there's no number next to it like mine. You should click further to reveal the numbers next to the username.
Or why not just search for me on Discord using the option "find friends". This is my Discord username: nevies0698#0
Tap the icon this arrow is point at, click on find friends, paste my username.
I drop you an encrypted transfer with my email in it. You need to use your memo key to read it
Might be more easy.
Alright, how do I go about that? Where do I find the transfer to insert my memo key and all?
If you ask me, the easiest way is you message me on Discord with the username I've provided.