First Few days of Prep UPSC 2027

I started my preparation few days and honestly it's not being going how I had planned. I'm understanding the content I'm reading, enjoying it as well but after a certain point, I can't seem to sit again with the same focus and dedication after an hour or 2 of study.

I know this is not how I'm going to prepare myself for the exam - also I'm just reading and marking short notes in the book only.

Please provide a solution if there's any. What can i improve to be more exam ready?