I posted a little
review back when I got mine, though mine came from PullipStyle not JunkySpot. I would say its... intermediate? Not hard, but not snap together and put stickers on either. The assembly itself is pretty easy but there's a little more to the prepping and painting than most dolls. I find that it really needs to be given a very fine sanding all over to get sealant to stick (use 180-200 grit, just enough to it isn't shiny), and you need to also do the eyelids. And you also have to decide what to do with her eye chips. If you've done a custom pullip I imagine its far easier as you can completely skip having to disassemble and remove the factory paint, but if you're used to bjds its a little more work.
Er also those guides earlier posted are good, but, I would really really not use eye shadow. The writer of those doesn't know that there is in fact oil in eyeshadow. Trust me on this one, I'm a cosmetologist, there is definitely oil in eye shadow (and almost every human cosmetic out there, from makeup to soap to hair products). Its good for our skin for the most part and helps it stick to us, but its really really bad for plastic and resin! Stick to chalk pastels, you can get a nice basic set for $10 if you live near a Michaels and get their coupon app.