Tips for beginners with Golf GTD insurance

Hello guys, I have a question about my hopefully soon coming car dream. I plan my first car purchase, so I’m a bloody beginner (runs already two years). I looked out on the internet a nice used GTD, everything with parents cleared up, and then swoops should go to the visit. But before that my mum told me that I should call our insurance guy again, what this car for me every year in insurance After the phone call, the tour was canceled; 3100 euros a year, if it is admitted to me and 1900, if it is admitted to my mum as a second car, with me as the youngest driver. That’s just way too expensive for me. And now my question: Do you have any ideas on how to join such an insurance for such a car most skillfully? Or do you have a wonderfully cheap insurance that you can recommend? Is there any kind of insurance? And any tips you can give me as a “beginner” in that direction? I would really be very grateful for one or the other answer.