For A Levels I did Maths, Physics and Chemistry. No languages at all.
For PPL level exams, which I did in my nearly 30s, I found having the Maths and Physics was a help but not essential as the exams were logical. Even Meteorology.
When I did my Instrument Rating it was a whole new ball game, as the course hadn't then been dumbed-down so it was the full syllabus exams. Don't know if Chemistry A level helped with Met Theory or Practical (2 exams) but possibly.
I also went to Uni and read unrelated courses - some or none of which may have helped with the various CAA exams I have sat!
Others will have started flying just post GCSE - you can solo at 16 just need Air Law done (and a medical cert and instructor sign-off
)
Speaking of which, if you're serious about going commercial get your medical out the way before you commit to an expensive course of flying.
No point spending nn,nnn pounds just to be grounded.
Good luck. Bon voyage
The right to reply will not be silenced. XR and Insulate Britain are traitorous scum.