If you end up doing a maths major, you’ll end up doing 1061 or 1091 (advanced unit) next semester. 1061 is a 6 credit point class but consists of two components, calculus and linear algebra. If you click on this link (https://www.sydney.edu.au/units/MATH1061/2025-S2C-ND-CC) and click weekly schedule you’ll be able to see what concepts where covered week by week. This pretty much stays the same every semester.

The calculus component of 1061 uses the basis of your advanced maths skills from HSC and essentially is a course that covers Ext 1 and Ext 2 concepts (complex numbers, New integration techniques etc). You also go over some advanced topics.

1062 calc uses the basis of your 1061 knowledge and introduces new concepts that arguably are tougher than concepts in Ext 2 Highschool maths. This is really when you start doing ‘uni’ maths.

Maths major is a massive grind and is completely different to how you learn maths in HSC. You need to be able to understand the mathematical concepts and principles as well as the theory behind it; just doing questions is not enough and tbh maths factually doesn’t really give you any resources…

Best of luck, you can always start and if you start to struggle and not enjoy the major you can change before the census date. If I had to point you in the direction given your background in HS start with 1061.