Thank you about your solution, that needs to be set to work right, in the end I created a child of the retargeted blueprint, then I could set my own skeleton, but then the animation looks like is not working right, cos in the blueprint animation is not playing the parent animations, you can see it here
it is weird but it works on the character, you have to set up like this
In the end It would be better if you could see it working on the animation child blueprint too, but works on the character blueprint