The physical sciences encompass a lot of fields – like Physics, Chemistry, and Geology – that are about the study of the non-living (inorganic) world. If you loved physics class in high school, enjoy studying about chemical reactions, or like learning about nuclear physics or astronomy, this might be a good fit. These fields can be experimental, involving work in a lab or outdoors, or they can be theoretical, involving work you do in your head. But they are intensely intellectual and analytical, and not very social. So whether you enjoy them a lot depends on whether that seems appealing.
Here’s a good video on why someone might want to study physics, from James Madison University.
Here’s some good reading by the American Physics Society about why to study physics: