I feel dumb. I used the debian (other). But, now i did use the right one and followed the steps.
The command ‘certbot renew’ now gives me the following output:
The following error was encountered:
[Errno 13] Permission denied: ‘/var/log/letsencrypt/.certbot.lock’
Either run as root, or set --config-dir, --work-dir, and --logs-dir to writeable paths.