In my opinion NO newbie should even consider taking on a pillion!
It changes the whole dynamics of the bike.
+ if the pillion even shifts their weight when stopped at lights etc, that can bring them both down when not ready for it.
2 years + before taking passengers IMO
Note, I’ve been riding 30+ years & just about seen it all! & before you ask, I’m just here to see whats new as you never stop learning