How to package software for guix?

[Omar Radwan]

I wanna get into guix development. Since I don't know any programming, I
would be most useful in packaging software for guix. I want to package
lxqt. I know qt5 is in the guix repo. So it wouldn't be very hard to
package it, I think. But how do you package and upload software to the
repo? Do I have to sign up on anything or get a gnu email or something?