Here's my pronouns:

I'm also fine if people use they/them for me, either if they do not know or just speak out of habit in general.

In terms of names with which you can address me, the following are fine, I don't have a specific preference for either so use the one that is in your mind and rolls off your tongue the easiest:

• Andreas
• Andy (and the german Andi is good too)

If you want to address me using my nickname, this works:

• pixeldesu
• pixel

I prefer my nickname to be written in all lowercase, mainly because I think that Pixeldesu looks ugly typographically. If you just call me Pixel, the uppercase variant is fine.