In case you also want to make a crown like this, I have a few tips:
-use a slightly smaller head than your model, I made it on my head and so it's too big for me (and most people), but for Emma it sits rather nice.
-worbla can be perfectly used as a clay, since it was the normal worbla there was still some of the texture in, which made it look more organic.
-if it looks like crap, if anything looks like crap, add some colour, both in the painting as well as the red leafs. -if you want pretty paintstuff, use all the colours and don't always use the colour straight out of the tube, mix it like a DJ.
-get a friend with cool elf-ish hair. Mine was @ashildrtheswift ,you can also borrow her with some Marveljokes and a few cats.