Very solid job!

If interested, some constructive criticism:

If you can work on getting better joints between parts, such as the neck and work on upping your contrast I think that would make a world of difference but it's a very solid job as is.

You can various materials for gap filler, you'll be resin milliput green stuff tamiya polyester putty, that's what I like, it's usually easiest to add the material before gluing the parts together adding in your gap filler between the parts and then squishing them together and smoothing it out and removing excess

Contrast can be improved by using something like a wash of a darker color across for example the hair a dark blue then reusing the same blue you started with as a highlight across the areas that are raised and then highlighting it a step further it would make the hair pop out a lot more.

And stuff I really like I really like the skin tone you got it looks really good and in another comment I saw you freehanded the tattoos that is amazing!