What should be considered when selling privately?

Hello, I know that this is actually about the purchase and not sales advice, but I did not find a more suitable topic. I want to sell my car, since I have never done this before, I am looking for something like a reliable checklist for private sales. How does it work with the insurance and the registration? How would a good purchase contract look? What is this purchase contract of HUK Coburg – purchase contract? Intuitive I would say now. 1) Find a buyer 2) K Sign the contract 3) Unscrew the license plate 4) Pass the car 5) Log out at the registration office 6) Cancel insurance Thanks already. Mfg