Thank you very much! Yes, it's possible to make BJDs out of air-dry clays like Ladoll but these dolls are too fragile for play. I use Apoxie Sculpt instead. This doll is a manufactured one and made of polyurethane resin. It's from I-Dollstudio.
So many questions)) Fortunately I made some guidelines. Wigs: [link] Short guideline on joints: [link] Also I can recommend this tutorial: [link] Makeup brushes: [link] You can find makeup tutorials on Youtube. The questions you asked are rather complex and require a lot of research. Hope this info would help you to start.