I think what Xleeder said is kind of true, but please keep in mind when you get to the point of animating that MD2 uses frame animations as opposed to skeletal ones, so once you rig up your model, pose them first in skeletal mode and then convert those poses to frame ones, you should be able to find the option to do that in the Animation tab.
Also, another good thing to keep in mind is that MD2s require all the textures to be in one image.
Play around with premade models from The Models Resource first and then maybe make your own.