I'm think you're getting off to a great start, Buggi, and I feel that the basic facial construction could use a bit more life and energy. Would you like to loosen and liven up your lines, shapes, and spaces with 10 minutes of 2 minute faces and expressions, all flipped vertically?
The reason why you would do this little drawing tip is as a result, you'll tap yourself more into your creative side of the brain, but to help you get better in your drawn observations and caricatures of facial expressions, except to make your faces and facial features a lot more fluid and vital. For more information, kindly look into Drawing from the Artist Within and Drawing on the Right Side of the Brain by Dr. B. Edwards. Good luck to you and your march of progress.