I adore XFCE, simple, functional, lightweight. What more do you need? I am currently running pop_os which defaults to Gnome and by comparison it just feels heavy and clunky. The other DE I had love for was enlightenment years ago. A purely keyboard driven DE. It was glorious.
Congrats! I have a Galago Pro and a Gazelle that I purchased several years ago. They both work great and I am very happy with them. Love how open s76 is with all the documentation and software support. Have been considering ordering a desktop from them with an AMD GPU as a gaming machine. Enjoy the laptop!