I now have about 20 euro on my PayPal account, but if I start the Probemonat, then the money is debited immediately, or only after the Probemonat?
Only after the probemonat, you get 3 days before the end of an e-mail to disable the account, otherwise it will be charged immediately
Only at the end
You will get a message before the probationary period is over, you can then quit or complete a paid subscription