Is doing an EPQ in year 13 a good idea?

Hi, so I’m currently in year 12 studying math biology and psychology. I used to also be doing geography so I was doing four A-levels at the start of the year. I’m part of Duke of Edinburgh, aim high humanities and Russell group workshops so right now I have a lot on my plate so that’s why I didn’t take EPQ at the start of year 12. However my teachers have said that I can do EPQ in year 13 but I’m not sure because I feel like it may be a lot more work because I know in year 13, you meant by seven hours a week per subject instead of five so I’m not sure if I’ll be able to manage the workload. Any advice?