Hi there! I'm pretty new to working with polymer clay myself, but maybe I can share with you something I've dug up on the subject.
Because polymer clay can be baked several times, you might want to consider series baking for dolls & figurines. I stumbled upon this really informative page on www.elvenwork.com that covers the basics. I've linked you to the paragraph specifically on series baking, but if you explore the site a little bit you'll find some very useful reading material. Good luck, and I hope this helps!