Mesh is rigged in Blender, but animations for that rig won't play

It would work if I would know how to transfer the skin weights from blender to maya. Maya weightpainting is a pain in the ASS and there is no way to get my beautiful weightpaint from blender into Maya. :frowning:
I don’t know how to properly weightpaint in Maya as well. All I know is that it is a pain and a hell to go through.
The problem is in maya it is only in grayscale for me and the paint tool is horrible in controlls, also I have no idea how to paint the spines in maya. Those would need one single color value per spine. I do not even know how to do this in maya. Maya is just a pain.

I tried this Dora Weight painting tool but I now think it is a big hoax. It does not work at all. Its just an empty dialog box that can not import anything. I have no idea how people make it work:

https://blenderartists.org/t/addon-export-weights-to-maya-dsw-format/681296/7