My friend luck is with you. 
what you want is exist and is for free. And I created some tutorials for it just a few weeks ago .
please take a look here :
In tutorial in Part1 I used free model from http://cadnav.com/ .
But you do not need to download model from there because Mixamo.com has already free rigged human models with thousands of animations you can apply .
So you can simply skip the Part 1 and continue with other parts.[but i suggest you watch it 
]
Also peoples here gave the idea about creating JME’s own asset store few weeks ago. and in future we may have our own asset store with free or paid models.
Oops I forgot to say that if you have any problem in any steps above please ask it and I will try to answer it if i can 