Hi Sebastian,
welcome on Hive.
If you truely want to create a Hive-presence here, I suggest to create a new account and stop all your relationsships with Hive account@jnmarteau. He is apparently scamming newcomers.
First check if you are the only one in possession of the keys to this account and wallet. Best is, if you change all your keys and share them with nobody!
You can do this by going to @yourhiveusername/permissions.