Unfortunately, I can't help you with this question. Still, there are many websites on the internet where you can find an answer to your question. I went on a golf trip to Germany some months ago, and they don't require insurance or something similar. I just bought a train ticket on https://www.dbauskunft.com/de/ and went to Germany, nothing complicated. I was lucky that when I got there, I managed to take part in a golf championship.