Cambridge Application

I would do interview practice, if you haven't already

How do I do that?

You can find example interviews/mock interviews on YouTube (e.g. this one: https://youtu.be/lcFMcohMcVQ?si=Oz93MyLaOFKmEtSo). However, autumn of Y12 is definitely way too early to start interview prep. Focus on your predicted grades, settling into sixth form and looking at which degree you want to study. If you're sure you want to study maths, try some mini-courses, introductory lectures, competitions, etc. (there will be a comprehensive list of supercurriculars on the Cambridge website). Note - do not underestimate STEP. Even getting 100% in your FM papers does not guarantee (nor indicate) S1 or SS in STEP.

Just ensure whether Cambridge want to see 3 A levels in one sitting, they usually do. You look like you are taking 2 in Year 12 and 2 in Year 13.

How do I do that?

Completely sure I want to study mathematics with physics. I am not underestimating step, i've got full marks on a handful of step questions. I'm curious when you think would be the right time to start interview prep, how important it is and how much I should do since I have no frame of reference really. My predicteds are going to be the easiest part for me. I'm already more than capable of doing 2/4 a levels at A*, can answer past paper programming questions perfectly every time I've been given them, and physics I don't really have a crowning achievement but it's really easy to me so far and everyone else is finding it difficult

A teacher, counselor, Cambridge student, etc. might be willing to act as an interviewer

Consider applying to PROMYS Europe.
It's a brilliant experience - I absolutely loved it (although note it is rather competitive to be accepted for)

Hi, I've just started year 12. I'm taking Maths, Further Maths, Physics and Computer Science. My Computer Science and Physics teachers already think I'm going to get an A*, and I'm taking maths and further at the end of yr12 and aiming for 100 and 95% respectively in both (already getting 90% average in pure Maths and 80 in further pure papers but have only spent 150 hours studying so with all the time i have over the next 2 years seems doable to get those scores). My GCSEs are 9999998888 + A (I know it might seem odd considering my goals that I didn't get full 9s but I genuinely didn't start studying until April). Assuming I get the 4A*, and SS or S1 in STEP, what can I do to further increase my chances beyond higher-level reading and competitions?