It is estimated that the matriculation entrance exam you asked refers to the Aachen matriculation entrance exam, the Aachen matriculation entrance exam and the oral English exam in pairs. Introduce yourself respectively, then give pictures and descriptions respectively, and then the examiner asks about some related contents of the pictures, something like this.
The quickest and easiest way to adjust your mood is to take a deep breath.
Suggestion: First, ask questions as accurately as possible. There are many preparatory courses in Germany, and the entrance examination for each preparatory course is different. So when asking questions, you need to specify which preparatory course it is.
Second, if you choose to study in Germany because you failed in the college entrance examination, it is not recommended to study in Germany immediately. You can consider going abroad for a master's degree.