huh ... you get no comments .. WTF ??
sorry that whas propably actident ..
ok

Whites
"whan painting white - dont use white actualy"
the trick is that white is not a color without eny hue - so it reflect 100% light back - wich is imposible to paint so to make whites more real we usualy try topaint them using off Whites end mixing them with colors in area - in a way as they would collor themselves from surrondings
so actualy nurse would have a creme whites on her - skin end hairs , end a litle greenish (just tint of green ) nead belt
beside that whait material cast shadows like eny othr - so we paint that

- similary - color reflected
on knight best part is shild
end rest of whites are flat , not intresting -ther is no life in it - so whats missing - light end reflections of colors from surrondings
Avbout newest mini - When choosing colors - use this :
https://www.colorjack.com/sphere/
realy help with color selection
Green end pink/purple - thats complementary = black vs White - totaly oposite
thats good way on contrast but quite overpowering
end mey lead to flatning image -
80% contrast on this mini end diorama is on color
a real contrast made by ligght end shadow is on heat end a litle on skirt - rest is flat from light side of contrast
- the moust inpresive works acts moustly on light / shadow contrast - not on color 1
- so your goal should be "LIGHT & SHADOW"
beside that your works are xlean wich is good start point to paint better
