If you have a specific question about making art dolls you should take a look at the PosableArtDolls (https://www.deviantart.com/posableartdolls) group. We have an open blog so you can submit your question and every person who follows the group will see it in their message centre and will be able to answer.
So far we have had :
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These are problem-solving questions specific to peoples personal projects and some general advice. All of it is useful and interesting, so please add the group to your watch-list if you feel like helping or submit your journal if you're stuck!
Please remember to be polite.