Do you actually have a 3D model of the person you want to make? I've never really used Jamagic, but if its anything like any other program I tried to learn, you cant just draw what you want in an editor like in MMF, you need to import a 3D model from somewhere else. I'd recommend 3DS Max or Maya. If this isnt what your talking about how ever, no need to listen.
Well you need to model the guy first. I recommend using Anim8or from here: http://www.anim8or.com.
Then here is some code:
//makes a new 640X480 window with the title "3d dude"
myWin=New Window(640,480,"3d dude");
//makes a new world and passes our window to it
myWorld=New World(,myWin);
//makes a new camera and passes our world and window to it
myCam=New Camera(myWorld,myWin);
//loads a 3d object named "Smile" into the world
myWorld.Load("Smile");
//Gets the last object loaded into the world and store it in the variable mySmile.
//Now you can use mySmile as an object to do whatever you want with it .
mySmile=myWorld.GetObject(myWorld.GetNObjects()-1);
//Allow us to move the camera with the arrow keys
myCam.Walk();
//loop to keep the program going.
While(1);
Anim8or is only good if your looking for a free program that can do 25% of what the big guys do... if you can, use 3D Studio Max 7, maybe an earlyer version if the price is a little high.
I recommended it becuase it works well in Jamagic... Jamagic has some bugs with it's import code so finding a program that actually makes working models for Jamagic is important .