Cant connect to OBD II

Hello RealDash,
how the duck i can Connect it to my car? I have an OBD II Bluetooth Adapter but the app dosnt Connect with it and i dosnt understand why or where i can See the setting about it. Please help!

I used the App on an Samsung Note 8 on Android 9 my car is an Ford Fiesta ST Mk8 from 2019.

Greetings from Germany

Sent you instructions as a reply to your email. You can find the same information here on the forums on OBD2 section.