Good future for my girls

I am a full time solo Dad of 2 girls 9 and 7. My 9 year old has behavioral issues cause from ADHD and struggles with to many people and with loud sounds, after 4 years at school and multiple doctors and specialists appointments in that 4 years to try and help the school finally excluded her.

Leading up to her been exclude I left my job to try and help as I was having to go to school to sit in classes with her or pick her up, I was doing door dash for extra money but since October last year I've had her at home with her doing correspondence and she is doing great but with rising prices and her growing and eating more and more power being used and with no help from there Mum part from a little bit of child support I'm struggling with money.

So what I would like to do is start an online business so I can support myself and girls and get off the benefit.