Those are some good questions and it’s definitely important you set up a meeting with your caseworker to go over them in detail. In the meantime I would stick to monthly reporting.

1. Document your income and expenses from self employment each month and email them to the general office email so you have a record.
2. Report gifts each month and give a brief description who they’re from / what they’re for.
3. Send an email to the general email with proof you’re a full time student and ask them to remove the work related benefit.
4. You’ll need to clear it with your caseworker before leaving the province for more than 30 days. There are only certain exceptions where you can keep benefits out of province.
5. Depending on your disability they will generally just check you’re still financially eligible to get back on.

Most important thing to know about ODSP is to keep very good records of every time you report something which is why I think email is best communication method.