Should I do an EPQ?

I’ve just started year 12 and have chosen Psychology, Sociology and Religious Studies A levels as well as an EPQ with the intention of studying education and university and becoming a primary school teacher. My school has now given me the option to volunteer at a local primary school instead of doing an EPQ. This is something that I would like to do and I already volunteer with girlguiding and have done work experience in a school but I am definitely interested in doing more. It would be great to have more time to allow for this since I also work on Sundays and am concerned about finding time for additional volunteering. However I also know that some unis may give me a lower offer if I do well in an EPQ so I’m not sure which one to pick. In case it’s relevant, I am interested in applying to Cambridge but I’m still not sure if I would go since the course isn’t as appealing to me as others.