How to install a SDDM theme from source in Debian Buster?

Hi, LinuxConfig Team!

I have Debian Buster 10 with LXQt dektop. I use SDDM as greeter and session starter.
I would love to install the beautiful Breeze SDDM theme without also installing the whole KDE packages that Debian requires (they are too many and I do not plan to use KDE in the near neither far future).

I mean, maybe I can download the theme from GitHub and put it in /usr/share/sddm/themes, change the related line in /etc/sddm.conf file, and voilá! What do you think?

This question is more a petition of advise before I screw up everything in Debian (:smiley:).