Share solid careers with little schooling please!

I’m a single mom, I have like 3/4 of a business degree. I would be willing to finish if I knew it would be worth it, it just didn’t seem like the debt was worth the degree in that area. I’m trying to figure out my next steps to be able to provide the boys and I a GOOD life and get out of our low income apartment. I currently nanny and make $15/hr and pay no childcare as they are with me, so making more than the minimum jobs I’m limited to, and not paying for childcare but this isn’t a long term solution. I looked into phlebotomy but the income isn’t much more than minimum wage, considering ultrasound tech maybe. I’m not sure what to do: I have a yoga teaching certification but that takes time to build up and would need to be more well rounded not just classes I feel like. I used to do physical therapy on race horses but the area I had to move to for my children’s safety doesn’t have the demand. Any advice welcome!