Hi everyone,
I'll be completing my undergraduate degree from University of Manitoba, and my aim is to be a Boeing-777 pilot. My question is that,
if I get a CPL do I have to do another course to get a rating for Boeing-777?
I apologize if I come across as a complete noob, thats because I am. Literally all I know about paths to be a pilot is through online research.
So if you guys any advice, feel free to share it aka please drop some wisdom.

It is pointless and counter-productive to aim to fly a certain type or aircraft. We all had our favorites of course when we were kids, but you cannot plan your career around a specific aircraft type (unless you're military).

The typical path in the US (Canada is similar):
CPL w/ IR
Instructor ratings
Work as CFI to 1000 or 1500 hours.
Fly small freight/charter planes to 1500 hours (optional now)
Fly regional jets as an FO for 2-4 years.
Regional jet CA for 2-10 years
Major airline.

At the major you'll fly what your seniority dictates, usually domestic (north america) narrow-bodies. More senior pilots do most of the wide-body/international flying.

If you really want to fly widebodies over-water, that will limit your major airline options. SWA and Westjet for example only fly narrow-bodies in North America.

As a Canadian, your best career progression will probably be at a US airline. You'll need right-to-work here, but could actually live in Canada and commute to work in the US if you wanted to.

You need to start the 1st steps, like the Canadian equivalent of a private pilot's license. It sounds like you don't have that yet?

You are welcome to investigate & come on down to a U.S. based flight school. Yes, that may take a little $$.

Don't concern yourself with the 777 right now, though it is a viable goal down the road. Get the process rolling if that is where you want to end up. It takes some motivation no matter the route you take.