It's a no-win situation. You either have to find somewhere cheap enough that you can afford rent but it might not be nice. Or you need to find a few sources of income from roommates. Or you need to get the government to subsidize your housing - unlikely to be nice but these days a lot of new developments are required to have a % of units designated as affordable government housing so it's possible to get in a nice place. Here waiting lists can be long (decade+). How much is available and so forth obviously depends a lot on where you live.
If you have a case worker they're the one to have this conversation with. They'll know the local resources.
If you want to buy a house/condo that's a different story entirely. That you'll need pretty solid finances for.
Unfortunately, you and everybody's got to live within the system we're in, so you've got to find a way to improve your chances within these constructs and limitations. It is sad that you and your family may have more difficulty than others to do so due to things you mentioned above..
According to the internet.. the "average (canadian) Joe" earns ~$4k/month (2020) and household income is ~7k/month (approx. meaning 2 people need to work to sustain an avg. Joe family of 4). Of course there are slight differences depending on which province/city you live in.
So if it's just you and your mom working that's able to work right now, you'd really need to earn at least 4k each (or even a bit more if you're also supporting your partner)...
I don't (and I doubt too many here) would know the canadian wellfare/support/pension system well enough to provide you with much help so you'll probably need to find out (or get someone to help you find out) how you can get your city council (or whoever) to help you. Social worker maybe. See if your dad (who I'm assuming isn't/can't work but has worked) qualifies for some sort of pension?
I'm pretty sure the canadian gov't provides some sort of financial support for education (because my tertiary education (in US) was 'subsidized' I believe in some gov't scheme/funding)... and if possible for you (and/or maybe even your mother) it's good to consider furthering your education in order to increase your chances in getting jobs that pay better.