No time to revise my notes

Hello all, I am a final year uni student doing biological science. I am also on
holidays which will resume on 20th January.

The problem is that I am really struggling to study. What I am doing is that I read some chapters in my textbook and then copy the chapters to my copybook which
takes lots of time.

I have been doing this since 1 week (start of holidays) and I am not having the time to revise the notes that I copied in my copybook because I have other remaining chapters (about 10 chapters remaining) to copy also which is very time consuming.
By the way I have only copied 1 chapter which consists of 25 pages.

Thank you for reading this and any help is appreciated