Guys, always pick A-levels based on your strengths first and foremost whilst doing something you will love/enjoy. And if you will go beyond that then make sure it's something which has great prospects, e.g subjects which can get you into Optometry, Pharmacy or Dentistry.
Anyhow this how my journey escalated:
Average GCSE's with only 2 A's in RE and English; those subjects came naturally but I did not pick them at A Level. My A Levels were:
Physics
IT
Psychology
Did terrible, then did a diploma which is now known as the extended btec worth about 3 A Levels (no exams but coursework assesments) in aerospace eng.
Turns out the top 10 uni I wanted to go to does not accept that course so had to do entry exams and get 80%+ in modules involving math/physics besides other subjects such as programming, material science and chemistry which we also had to take.
I just missed out on qualification in a few of the exams so had to retake them in the next academic year and then finally after like 6 years of leaving school managed to get into my uni of choice.
Am not naturally gifted in science/math and also have NVLD, dyscalculia, dyslexia and dysparaxia; didn't know this until recently so guys I think if you feel there is an issue get it checked out to get support, I was stubborn and didn't until my final semester in uni. Anyhow those were major obstacles and other turbulence in me personal life but I never quit and now am on the brink of graduating god willing, so to all those who are not straight A students, do not have adequate resources to pay for tuition and always find themselves on the ropes if a bum like me can do it and I am the bare'est among all bums

) trust me you"ll be fine so long you NEVER GIVE UP and am not saying it's going to be easy because it won't be, you will fail most of the time but what will decide your sucess is how many times you are able to get up and keep moving forward, it's how winning is done my brothers/sisters !