So you immigrate base on your own profile - education, age, work experience, language and money. If single make sure you have full custody of child with court documents. Good luck on your immigration journey.
Okay past posts say your are 42 and just crossed the border. Talk to a lawyer and don't use this forum for information or to ask questions. Only use a professional Cannot live off ODSP but good luck.
You will know when you get the study permit. You should get new LOA for Grade 9 if letter was just for the past year and not for 2025/26. They can refuse your without LOA.
1. Your status has nothing to do with her. She needs to meet RO to apply for renewal. So she needs to return.
2. When is she returning? Once she meets RO she applies for renewal. Link attached.
https://www.canada.ca/content/dam/ircc/documents/pdf/english/kits/forms/imm5644/01-12-2024/imm5644e.pdf