There's a lot of leads in the article itself. Links to other articles. CBC has an entire Indigenous section linked in the header. Go to APTN. Find out who the tribe closest to you is and go to their website. Look for "Resources" sections.

Go to your local library's website and search for "truth and reconciliation". Read the recommendations. Read books and articles and watch YouTube videos discussing the recommendations. Make sure they are created by First Nations, Métis and Inuit. Go to wikipedia and search for any three of those peoples. If you're in a densely enough populated area walk into a bookstore and find something on the display of books on the topics.

Change your information diet so that some of the music you consume, some of the video games you play, some of the podcasts you listen to are created by indigenous communities inside Canada's borders and around the world. Watch TV shows like Rez Dogs, graphic novels like The Outside Circle.

If I may project a bit, it seems like it may be that you are overwhelmed about where to start, not ignorant of sources of knowledge. It doesn't matter where you start. Pick something that catches your interest and follow threads. The only thing that can happen is that you learn something.