regarding entry for medicine

Hii.. I came to newzealand in June 2024 and was in year 12 but all the internals were done when i came here only i did 2 internals and rest all externals and somehow passed year 12.. I'm keen from childhood to join into medicine and it's my dream..but now as I came in between i am scared whether I can enter into medicine with my credits. Hopefully, I completed year 12 with 80 credits, passed NCEA Level 2 with 65 credits (30-A, 22-M, 13-E),passed NCEA Level 1 Literacy and NUmeracy and University Entrance Numeracy. NOw, I am gonna start my Year 13. My question is that..will they check only the year 13 credits or they will check the year 12 credits for entering into UNI..I clearly don't understand the structure for entering into medicine. Can anyone please tell me regarding this and I really wanted to join into medicine and i am capable of getting good grades in year 13.. but I don't know whether they will check only year 13 credits???...Is there anything else i needed to do to enter Medicine?? Is there any tips i need to follow to study year 13 to join medicine?