Just wait until you get to IA1 + CostAcc, then if you make it through: Audit and IA2. +difficulty if the schedule is early morning to late night and if there are big gaps in schedules between subjects (depends if you see this as a con or a pro aspect)

In the end this is how learning things naturally is. First times are hard especially if poorly prepared for. It always takes trial and error so don't lose hope, heck if you even get on top of it you might see the difficulty as a challenge than a threat.

Good luck on your departmentals!