Making Money While On Maternity Leave

I am having a hard time believing I can make any money outside of collecting my unemployment insurance and child benefits for the next 15 months. I live in Ontario Canada and am currently on maternity leave until Dec 2020. I would like to maximize my maternity leave but would also like more of an income. If I work while collecting ei, I jeopardize collecting that guaranteed income, however I feel like I am stalling myself from my financial goals.