I heard about
https://www.custodianship.ca you can give it a try but I personally did not try nor know someone who did. If that did not work out then your dream is not crushed, you can wait until you're 18 and do it. Which I'm guessing isn't that far away considering you're enrolling in university. But keep in mind as I have said earlier, no matter who you find whether a company or anything, in law they're your custodian meaning they should be around you most of the time and they're in charge of everything and you cannot do anything without them. Not to mention the living part, they should provide you with a Canadian household or some cases if its the university then dorms which will get very costly and inconvenient for you. My advice for your own comfort is waiting till you're 18 and to consider this time a gap period to have fun which is what I did. I'm going now in 10 days after missing out on September's intake and its not as horrible as you make it sound. Your dreams are not crushed. If you still are convinced that you should go now despite everything I said, then you can check the website and similar companies related to that field.
I really wish you all the best of luck!