Student First Vehicle Insurance Classification?

Hello I am a student at the time of the insurance start 22 years old. I have been riding a 125-year-old motorcycle for 5 years and since then also using my parents’ car regularly. BF17 is part of it. Now the question is how to answer the first car most skillfully… Can you take over the SF years from the moped? Can I count on driving my parents’ car %? Thank you Johannes