i make quick correction. "He is just struggling to make it through the days, caught up in a world that sometimes feels virtually impossible to get out of." Here, the word world means imagination, like he is trapped in his own head. so he is thinking alot about something that troubles him and he cannot stop. the world isnt physical, it is emotional.

Thank you Lyndon.

Caught up in a world refers to a state of reality or the paradigm one exists in. That "world" refers to the situation the character finds himself in. We are talking about his reality and not necessarily an actual "world" - although if it is a science fiction or fantasy story, it could actually be another world. It feels like he may be talking about a specific country that endures hardships due to the government but would need to read more to understand.