Cambridge A-Level, Life Confusion.

Hi everyone,
For my A-Level predicted grades, I have Physics (A*), Art (A*), and Maths (B) — which I plan to redo because I’m confident I can get an A. My teachers have been asking why I don’t want to apply to Cambridge. They weren’t telling me to go, but said it’s something I should consider. Honestly, I’ve never thought I’d be at this level or even think about applying to such a top university, so I’m a bit confused why they brought it up.
Firstly, I doubt I could get in with my predicted grades since I think the average is three A*s, so should I even bother applying? I know going to Cambridge could open doors and give me a prestigious degree, which I really want. But if I apply and don’t get in, it might waste one of my university options. I’ve also heard that studying at Cambridge is really challenging and might leave little time for things I enjoy.
On the other hand, I’m hardworking and passionate—I’ll do whatever it takes to reach my goals. But sometimes I feel like I’m so focused on working hard that I’ve lost sight of what I truly want. I’m thinking about studying civil engineering or architecture, but even as I write this, I’m not sure that’s what I really want. I’ve always been interested in the brain, but I also feel I have talent in art, and I don’t want to waste that.
With all this thinking about the future, I feel really lost. It’s made me realise I don’t know what I want. Can someone help me? I’m not sure exactly what I need, but I’d appreciate any advice about what I’ve just shared.

You get 5 options, you can only go to one university, so you have 4 spare choices you aren't going to be able to take up anyway. So you aren't 'wasting' a choice so long are you have even an outside chance.
The usual application strategy is to pick one Uni that is a bit of a stretch, so maybe Cambridge, three Unis that you are on track for, and one uni that is a grade or two lower, in case you have a bad day (but make sure you'd be happy to go there).
Make sure that a) your data on averages is accurate and b) you understand what average means!
Be sure of the degree before you pick the University, and that means not being afraid to take a gap year. You can go through the motions of an application this year, but planning a gap year gives you a free second chance if you want.
Resitting is pointless if you can convince your teachers to give you the minimum grades for the course.

Sorry for the late responses but thank you for responding, but i do have another question, your both saying i shouldnt resit maths but wouldnt resiting and achieving an A be helpful for unis i can apply to?

Sorry for the late responses but thank you for responding, but i do have another question, your both saying i shouldnt resit maths but wouldnt resiting and achieving an A be helpful for unis i can apply to?

I think retaking A levels can make Oxbridge applications less competitive, but it would probably help applications to other unis

Mocks don't mean anything. You need to get predicted grades from your school that are at at the minimum level for the course, or more. Then you need to get final grades. Tests set by school mean nothing. What they are going to predict is what matters.

im talking about my predicted grades