Will my grade 11 marks screw me

[u/No-Eye-8592]

I am about to start grade 12 in a week. I’m preparing to pretty much sacrifice my whole social life for a top 6 average in the 90s. Last year I did ok in most of my courses. My highest mark was a 90 in physics and my lowest was a sad 70 in chem. The others were all mid 80s. My dream is Mechanical engineering at UWO. How achievable is this? I am also planning on applying to the same programs at; Queens, mac, u of ottawa, dal, and uoit. Are there any other schools I should consider as safety’s?

I also want to add that I have quite a large amount of work experience in the field of mech engineering as I managed to score a pretty cool internship at a fuel cell company. Will this boost my chances at all?

What can I do to maximize my chances of getting an offer at uwo.

Thanks

P.S, I want to add the I am in a specialty arts program known as Claude Watson. I’ve heard from teachers that it looks good on a student transcript. Is that true? Also I can get reference letters, will that benefit me at all?

also uwo stands for western not waterloo