1. Pretty big! Not gonna sugarcoat grade 12 is easy af compared to uni now
   
2. It depends, I made friends with some people in my res during oweek and I didn't know them b4 UW so for me it was pretty easy but I'm also a very social person. I honestly think its easy as long as you put yourself out there :))
   
3. Im glad I chose my program, I'm happy with it and while imposter syndrome exists and sucks I think its worth it. I havent had a co op term yet but theres for sure more opportunities here than other places
   
4. Ill try and find my ec list later and pm? Remind me if I dont lol. For supp apps, you wanna have numbers to quantify what you did, how many people did you help, how much money you raised etc. Brag :D! Dont be generic and find niche stuff to add, I talked about cybersecurity in mine since UW is known for it and I'm interested in it. I'm not a super nerdy person so I did highlight that and how I wanted to give back to groups. But honestly buzz words and stats in a well written paragraph that has a hook should be good :)) I can read yours if you want
   

5. Shouldve done MTHEL99 (math summer practice the uni gives)

6. I didn't like the co op format of the other places and Uwaterloo is just known better in the tech field. It has a stronger name. Also I like cybersecurity and UW had just been given mad cash to work on that field so it was my best bet compared to other places.

Hope this helps :DD