Best way to get through content effectively?

Hi,
I have a lot of content to get through. What would some of your advice be?
Currently, I'm trying to:
- Read through all the content
- Make three columns in Word: the first for the word, the second for the definition, and the third for the explanation
- Create flashcards and revise
- Answer questionnaires and one-mark questions
- Work on past papers
However, I think reading all the content at once and then learning it is too time-consuming. I should break it down.
If you could advise me on this matter, that would be great.
Thank you!