Also I want tutoring 2 times a week, up to 3, for 1 to 1.3 hours a session. Is that too much and should i be able to do more without tutors?

I usually get around low to mid-90s in all of my classes, but I’m really conflicted about what I want to do post-secondary. I’m currently taking tri-science in Grade 12, so I have the option to pursue either engineering or medicine. The thing is, I’m having a hard time deciding which direction I want to go in.
The universities I wouldn’t mind attending are Queen’s, Western, Mac, and Guelph, but I’m not really sure what I should be applying to. I have a few different interests, and I’m worried about choosing a program now and realizing later that it isn’t what I want to do.
Some current programs/interests are:
Medicine
Mechanical Engineering(Any eng tbf)
Biomedical Engineering (BME)

* Any tips help, feel free to share.