Candidates should handle difficulties in understanding complex subjects for UPSC by breaking down topics into smaller, manageable segments. Utilizing diverse resources like tutorial videos, study groups, and tutoring can provide different perspectives on the material. Regularly revisiting challenging concepts and discussing them with peers promotes clearer understanding. Creating visual aids such as charts and mind maps can also simplify complex information. Maintaining perseverance and seeking clarification when needed is essential for overcoming hurdles in preparation for the UPSC exam.