Hello Karlo,
It seems as if you are very passionate about art and character illustration. To pursue what you love will make life meaningful and fuel you. You just graduated high school (it hasn’t even been a couple of months), so you have some time before you can begin worrying about working and helping your family. Why not find a job and pursue your dream at the same time? That way you will have a goal (move to Canada and study illustration) and you will have some money to do it on your own. Find a job that you are happy doing and help your family. Meanwhile, create a bank account and save some money for your dream. Most jobs are around 8 hours a day which leaves the rest of the day to practice drawing. I think it may be easier than when you were at school as well since you won’t have “homework.” Besides, since you enjoy drawing it may help you relax in your free time outside work. Don’t give up on your dreams, anything is possible.