Dual citizen trying to apply in Australian schools

Hello! I am a dual citizen here in the PH and in AU m. Im having a hard time applying since I dont nec know where I fit in I will apply through UAC however, since im from a province here I wasnt able to take IB courses huhu 🫩 Im not familiar on how to apply for the foundations programs either or how to apply in general. Any advice would really help me out thank you!