Cobo can consider ideological and political education, come back for two classes, and the political work route can continue.
If you study at work, the time will be longer. Some better schools have reduced the enrollment of in-service doctoral students.
Ask your teachers who are already studying for in-service doctoral students. In colleges and universities, a high degree is still needed.
Besides, I don't know what your major is. If you get excellent grades, you can't teach if you study a similar major. Man proposes, God disposes. You have to communicate with the leaders of your college. He will accept you after you graduate (the current leader can't give you substantial commitment), and you can succeed.