There are two types of reality.
The objective reality is the world outside the mind. It exists regardless if someone is watching or not.
Then there is the subjective reality. It is a continuous model that each brain creates based on input from the senses, memories, and predictions. It’s a useful representation of the external objective reality.
The model is decorated with useful representative attributes like color, sound, heat, cold, texture, taste, feelings, etc. That is the only world you will ever experience, and you yourself are a part of that model. You will never directly access the objective reality.
The subjective reality is subjective, and slightly different between different people, but similar enough for groups of people and societies to function.
The objective reality can only directly be accessed in science fiction movies, like the Matrix, though the representation is still in the subjective reality.