hi,
Personally, I just tried to reproduce the skeleton and then the muscles, to respect the anathomy and to have something realistic in the end.
I started with the vertebral clone (from the head to the end of the tail) to have a nice curve.
If after adding the muscles you don't like the shape, you can always readjust.

Hi, I only have Litematica I don't know if it's compatible with Schematica but I just put it in the .zip

Hello, no don't worry, I had it built quickly for a survival fortress project on a server, after it is possible that the dragon pose looks like other dragon builds, I did some Other organic if you want to see to prove to you that I know how to build organic ^^