Teach me make ragdoll modular character please

I have found many tutorials but not even one match with my ideal.

what I really want is
-modular character with many skeletals(like normal skeletal with tail,wings,skirt etc.)
-modular skeletals can be smulated (tail or wings hanging)
-these skeletals can be ragdoll

I am out of idea how to mix all that I mention together.

Your list of requirements is quite interesting. There is some relevant documentation that may assist you in deciding how you wish to accomplish your goals.

Feel free to read through some of the documentation on Modular Characters. The comparison chart at the bottom is especially useful.

For the idea of a skirt, please look into Cloth Simulation.