Refreshing driving licence needs input

Moin together, I would need your expert advice. I will soon have my car driver’s license ready and now I am faced with some decisions that I could use your help with. On the one hand, there is the problem that neither my mother nor my father have a driver’s license. This is not exactly an advantage from the point of view of insurance technology. Since I am still a student and will only have the school finished in 1 1/2 years, this could be a disaster for me. Now my questions: 1 . Which car should I choose if I want to keep my insurance contribution as low as possible? 2. Where do I get, for example, the type number of a car if I don’t own the vehicle license? So that I can go through some calculations on the internet without already owning the car. In addition, I made the driver’s license M almost 2 years ago and have driven the 2 years already a few kilometers… Can I take advantage of this with the insurance? And then In theory, the instructor mentioned that driving newcomers can almost halve the insurance percentage if they participate in an ADAC safety training. Is that still current? And how much euro insurance fee per month do I have to expect? I would like to thank you for your help.