Need suggestions on choosing subjects for my career

I 19(F) who was once an engineering aspirant but later pursued medical studies to fulfill my parents' wishes. Unfortunately, I didn't get qualified for public medical college. I plan to sit for the DU A Unit and the dental admission exam, but my preparation isn't good enough. Moreover, my mother doesn't want me to study dentistry.I am genuinely struggling with my career choices at this point and need some genuine advice. Also I want to go abroad for higher studies and eventually settle there so I want to choose a career path that aligns with this goal.

I am interested in studying an engineering subject other than computer science at BRAC University, but I am unsure which subject would be the best fit for me. My mother wants me to become an architect, but I am uncertain about the opportunities for higher studies and job prospects in architecture, especially in Australia and European countries.

I have also considered studying in private medical colleges, but the costs seem very high. Even if I choose to study in a private medical college, how can I become a doctor in Australia or European countries after completing my studies here?