How can I request all information stored about me?
After sending an email to their support I got the same links as text. I answered that this is not enough according to the German version of the GDPR. After 5 days I got an email reply asking me for my postal address. Now I am waiting for the data to arrive. Apparently Amazon wants to make it a bit harder to get your data exported.
What data do I get? And in what format?
Not known yet. If you got your data, please comment in this ticket.
How can I delete all information stored about me?
You have to contact their support to do this.