Before you start solving, you need to define what makes a past paper "exclusive" and how to use that to your advantage.
Owning an SIMSO Past Paper Exclusive is not enough. You must use it cyclically. Here is a 6-week plan used by past gold medalists. simso past paper exclusive
Week 1-2: The Deconstruction Phase
Week 3-4: The Timed Phase
Week 5: The Pattern Mapping Phase
Week 6: The Dress Rehearsal
Standard curriculum teaches you "How to solve." SIMOC asks "What to solve." Before you start solving, you need to define