If it is about „how your data can be abused“, definetly check out this short vid. Though it‘s probably not the same situation, still it shows how your data can be drastically misused.
The most important thing for a newcomer to the privacy journey is Threat modeling. DO proper threat modeling. Ask yourself „What do I want to achieve?“ „What are my goals?“ „How much privacy and for what do I need?“
Not doing this can lead to terrible results in your privacy journey. To name very few examples: Being too maximalist with my privacy costed me many of my relationships and my sanity - Reddit, I’m quitting this privacy journey and Obsessed with Privacy