@Beeves
Mkay, I can see several places where an inexperienced sculptor can face challenges. There really isn't much there to help unless I'm missing something.
How experienced are you with drawing and making art of the human form? Archive.org has fabulous and free books by Andrew Loomis for general drawing and people.
What type/brand of clay are you using? Have you made things with clay before? Some of it will come with using quality clay and practice. I've tried a few of them in my times.
Look up other tutorials like the Morezmore blog and just doing searches for ball jointed doll making tutorials. You might need to invest in a tutorial book, don't worry about reading them because the step by step pictures are great. There is one in particular that makes an adult looking female body. It could be under a dozen names but this is the cover. You just have to look around for a good price.
It covers making them from a drawing to basic casting, finishing, and painting. If you only have room for one BJD book this one covers the most.
I've had just about every BJD making book in my hands so if you have more questions let me know. I also have quite a few other types of doll making books and really need to make a blog post about them.