I just graduated in Law.
Do not worry about it. You are not a law student, so a lot of the terminology will be unfamiliar. It often takes a long time to read the cases,as they lack good punctuatin due to the complexity of the material.
Cases do sometimes take a long time to read. I would be weary about photoreading cases. It does help but you may not know what you need to concentrate on. Some cases should be read in full and especially some majority judgments.
Personally I found photoreading better for textbooks.
