Should I attempt Personal & Business Tax exam in Dec

System

I have had my books come through today and have got through 1 chapter in Business tax. I would like to sit the Personal & business tax exam in December, but not sure if this would be realisic for me considering its round the corner. I would be willing to work really hard to get through the books and past exam questions, but as much as I want to do it I would like to sit Personal & Business Tax exams in December but I am not sure if it would be realisic for me considering:
We have 3 children under 12
I work 25 hours a week
and I have got MS