They’re both great starters, imo! Xfce or LMDE is a solid choice for Linux beginners.
Xfce was a little too minimal for me & iirc it’s canonical-based. I chose lmde specifically bc I prefer Debian. I can’t recall if I had any major issues setting up either of them. I think it also just comes down to visual/aesthetic preferences. They’re both highly customizable so either way you’re good!
I’m gonna set up xfce for my dad on an old Dell desktop & i’m sure he’ll appreciate how close it is to windows right out of the box. 📦
Brahvim