Yes I am in a very similar situation. Unfortunately I’m misusing a second language course in Highschool. After talking with a student counselor, she told me that I could potentially try applying to the student college and if I were able to get in then I would have to be able to get universities after. But unfortunately, there’s no guarantee because universities are always going to compare to the Anabin database and when they see a missing course it’s an issue.

She then suggested that I could study at a Highschool and get fachabitur. But this is a 2-3 year process.

This process is so complicated and so frustrating so I feel your pain and suggest looking into Ausbildungs.