Ubc scholarships? highschool student? please help me? ?

i wanna apply for the entrance scholarship, im in grade 12, but most of my grade 12 courses are next semester, im only currently doing two grade 12 courses, calculus and english 12, and the rest is 11. next semester i have grade 12 physics bio and chemistry. my average is 93% and i volunteer 3-4 times a week at a clinic in a medical centre and tutor kids on the days that i dont volunteer. is there any chance of me being selected or do u have to be a 98% average person working and volunteering all the time? i wanna be a heart surgeon:( can someone please help me:(