I can only say : Learn to create bones, and animate on MED.

Yeah, sorry in fact i have inverted the tools in my mind
Yes i wanted to say : Learn Blender and do all that on Blender.

Even for your model, don't hesitate, to rig and animate it
from Zero on Blender !
For MED , i think bones, and animations tools are for simple things or for kids to play with it.
That's sure that wanting to do animations in MED is like wanting to cut a tree with a knife
Blender have lot of things , you can duplicate animations and put them anywhere, or duplicate only some bones animations , you have inverse kinematics, when you move/Mrotate a bone the others react less or more doing a lot more realistic movement etc ... etc ...

I agree , go for Blender !

Well then its ok

yes Blender really is a powerful tool, right now i learn how to use it with youtube tutorials.
At first it was frustrating (interface), but now where i know what to do i dont wanna stop anymore.