If you're new to Guix, you probably want to start with the Guix Cookbook: https:...

If you're new to Guix, you probably want to start with the Guix Cookbook: https://guix.gnu.org/en/blog/tags/cookbook/en/guix-cookbook.... -- although I've never read it front-to-back myself, just skimmed it and used it as a reference thereafter.

Not sure if there's a full howto for your purpose, but you'd want to look into manifests: https://guix.gnu.org/en/blog/2019/guix-profiles-in-practice/

There is a guix command for generating a manifest from the current profile as well, but it's not mentioned in the above link: guix package --export-manifest