I don't disagree on the importance of eating, BUT:
- The OP is someone without status in Canada who has already overstayed years. That alone can warrant a departure order or deportation.
- The OP asked for advice on legalization. She's in a very tough place and can get a legal status but should follow the rules to do it. Part of applying for PR entails detailing your previous activities and work - she would either need to lie on the PR form and say she wasn't working (which could result in PR or even citizenship being revoked for misrepresentation, her employer facing charges for illegal hiring, etc) or admit that she was working illegally which could result in a denied PR or employer facing charges, etc.
- The OP would need to explicitly seek illegal work and explain to potential employers she cannot be employed legally, which could result in a report to IRCC, CBSA, or the police. Each one of those is a recipe for disaster.
- Your advice suggests that one "doesn't need a work permit" to work for cash, which is wrong. You still legally require a permit. Your suggestion is that one can work illegally for cash.
- That's really outright horrible advice.