Start looking at colleges, and before you go set up an appointment with the coach. In this appointment you should talk about grades, clubs, and your chances in being accepted to the school. You could also set up a throwing session with the coach, during this appointment. An e-mail could look like this.
Dear Coach ______,
Hello my name is offset. I am ___ years old, and interested in attending _____ college and playing baseball for you. I was planning on visiting and was wondering if I could set up a meeting with you during my visit. Thank you for your time.
You should also state your High school and that your from Canada. You may also want to put in your gpa and or class rank. Your height and weight could also be included.
DONT put in what pitches you throw or how hard you throw. If he asks you then you tell him, but dont tell him in your e-mail. You also want to say that you will be willing to throw at your meeting.
Also what division are you looking into playing at?