Yeah, Specialist Maths can be confusing, especially with how scaling works. With DDD, you’ll likely end up around the low 20s or possibly below 20 depending on exam performance and cohort strength. Even if it shows as <20, it still contributes a small increment to your ATAR, so it’s not wasted.
While sorting out study stuff recently, I came across https://globesimregistration.org which explains SIM registration really clearly. It breaks down steps like OTP verification, uploading ID, and getting a reference number. I liked how everything is explained simply, which reminds me how helpful clear guidance can be when dealing with complex processes like study scores.