You are invited to send me encrypted mail using my PGP key, which can also be found on well connected key servers, with fingerprint
6FC8 4DA0 8920 932D 34DD CBCD 188E 3F10 8C69 3450.
If you want to learn how to use PGP, some good resources are
this concise PGP Guide, the thorough tutorial on Riseup or the elaborate free Basic Internet Security e-book which covers PGP and much more.
If you want to use PGP on your Android phone, I use and am very happy with OpenKeychain