Sehr guter Tipp. Beantwortet meine Frage.

It’s sold out, but here you are: https://asgoodasnew.de/Apple-MacBooks/MacBook-Pro/MacBook-Pro-2021/Apple-MacBook-Pro-2021-14-M1-Pro-10-Core-CPU-16-Core-GPU-1-TB-SSD-16-GB-spacegrau-sehr-gut.html

Keep an eye out on this page: https://www.idealo.de/preisvergleich/OffersOfProduct/201636407E2060J2_-macbook-pro-14-2021-m1-pro-10-core-apple.html

Nextcloud is great. It has AI features, too! Didn’t test these but overall, Nextcloud is a great product for everyone. Remember, however, that you need to use your own hardware to host your server, otherwise you don‘t have any privacy. You should absolutely take all the steps to check system integrity and harden your server. Not only once, but regularly.