IIIT Hyderabad UGEE is nothing like JEE Mains as it is highly predictable and you can never guess the weightage a certain topic will have even after going through the previous year's paper. The syllabus is also not fixed so it might be difficult to procure the right study material.
One of my friends was in a similar situation and one week before the exam he decided to browse YouTube to find something to study. He came across IIT prep which had extensive study materials, previous year papers, a detailed paper analysis, and a syllabus. This platform has amazing content and that too free. You can even find PDFs and Books that you can download and read thereby increasing your chance of clearing the first round.
So the best way to crack IIIT Hyderabad UGEE Exam is to go through IIIT Prep.