What can I legally do if my son’s father has given me nothing but problems since he has asked me to move out?

My son is 6 months old and I would like to know his rights. We have never been to court but I have filed recently. I have always given him the baby when asked but have made a schedule to make him happy until I can go to court. When talking about child support, he thinks that $21 for the first month was fine and that $50 this month will be fine. I am a single mother who has bills and everything else I have to do. What are his rights and can I change the calendars I have made? I try to stay civil, not fight and not keep the baby away but somehow he causes problems and always tells me his lawyer said he has 50-50 rights and that he will only have to pay $60 max a month of child support. I need help and I need answers. This is causing a lot of problems. He sold the house we lived in. He moved in with his sister, has no bills but phone, car and insurance while I pay for car, insurance, baby sitters, my son’s insurance, the roof over our head and groceries. I am on WIC so does that factor in with him not having to pay a lot of child support?