I didn’t do GCSE’s as a went to school in Australia, but in the equivalent years I had a whole variety of marks. I normally got As in science maths and english, but that doesn’t mean I needed to… I found those subjects were the ones that interested me so I put more effort in. I was never much good at remembering facts though so History was never my thing…
I got A for Maths, A* for Physics and A* for English if I remember correctly. But then my grades went down a lot for A level!
I wouldn’t worry though, my grades have never held me back and you really can achieve anything if you try hard enough!