Contact the course teacher immediately after failing the course. This is the golden age for you to save the course, and plead with the teacher in a tactful and polite tone. Some teachers may get you, and some teachers may not get you, so this is also luck.
If you are unlucky, the next step is to study this course again and meet the make-up exam next semester. If you pass the make-up exam, you can save your success, but if you fail, you need to take the course again. So after going to college, we should all study hard and try not to fail. Don't fish in class, listen carefully to the compulsory subjects, understand the teacher's requirements for elective subjects, listen selectively, grasp the key points of the teacher's class in time, and make key plans before the exam to avoid failing the course.