<p>In a week or so McGill will mail you a step-by-step guide to getting the paperwork done. All your questions will be answered. You cant start anyway since the acceptance letter from McGill has to be included in the applications.</p>
<p>It takes about 6 weeks to complete the process so you have plenty of time. I note you have a passport-- but if any other new students dont have one, they should apply for a passport right now. You will need one for to apply for your immigrant/study permits and that can take a while to get from the US Government.</p>