Merci for the question.
The easiest answer is to fund education within on-reserve schooling at the same levels as the provinces. The key to getting into university occurs in early childhood education, and the years from kindergarten to grade 4 supply that base level of knowledge that carries into university.
I would point out that indigenous young people from coast to coast to coast are at the highest levels of post-secondary education right now, and that will only increase with more investment in early childhood and primary school education from the federal government.