Excellent proportions in the bust, very good for a first model. However even without seeing a shot of the wireframe of the mesh, I can see clues that it’s not well designed for animation, mainly due to the lack of edge loop flow. Since you’re very new to this you may want to look up those terms to get a better handle on mesh topology (another word to research), which has a major influence on how well a model will animate.
The Othello face rig & model mentioned above can be found at the link in my signature. It’s not a simple rig so you’ll probably not understand all its features and design aspects at first, but it’s a place to start in terms of face rigging ideas, and the model has decent topology that would be good for you to study.
In terms of modeling an entire human figure, my advice is to start simple and develop complexity in the model as you go along, paying attention to good edge loop flow and other topology considerations. Just as in working with physical materials (which I think maybe you have some experience with), it’s better to block out a figure in its entirety and then work it toward greater detail all at once than to concentrate on parts. This helps preserve proportions and continuity in terms of detail.
You can also get some experience with rigging by building a simple armature for your figure early on, and trying it out as you work more detail into the figure. You’ll learn better how meshes deform under armature control, how to deal with vertex weighting and other similar issues, and correcting problems will be easier if you begin with a simpler model. By the time you get to a more detailed model, you should have a much better idea of how to make it move the way you want.
One tip: Put only as much detail as is absolutely necessary into your animated mesh – keep it as “lean” as possible in terms of polygon count and mesh density. The simpler the mesh, the easier it is to set up for animation, and you can use methods like normal mapping to give the illusion of high detail without actually using a high-density mesh.