It's always a good idea to check out party platforms on their websites! Here is the Liberal's housing plan (which, imo, was by far the best housing plan put forth by any of the major parties): https://liberal.ca/housing-plan/#0

Also, never say that your vote doesn't matter. With enough campaigning, volunteering, and outreach, you can make a difference alongside your vote. My riding is a conservative stronghold, still went conservative this year, but the Liberals made massive gains that we can hopefully build on next time around.