get good gcse grades first
take biology, maybe chemistry and a third academic subject at a level
more and more unis are no longer requiring chemistry a level but i would double check this when you’re starting to apply for sixthform/college. however still currently places look for biology chemistry and third academic subject or biology, another science including maths physics chemistry, and a third academic subject
sit the UKCAT/ BMAT which is basically the admissions test for all medicine courses
apply for medicine at uni
then get A*A*A-AAA for a level depending on what unis you’ve applied for
you progress to surgery after 5 years at medical school, 2 years foundation training in a hospital, and then take the path for surgery which takes quite a few more years (can’t think of it from the top of my head)
it’s a long journey. lots of dedication and hard work needed. i’m currently year 13 doing my A levels this year got 3/4 offers so far for medicine and it’s weird to think that soon i’ll be studying medicine at uni