Child support advice

Hello im single mother im 21, i breast feed my daughter shes 11 months shes really attached to me, havent got a job its been hard im a first time mom. babys father hasnt been helping with money. He use to give me 400 or 300 a month. Past 3 months nothing. I don’t get money from government either. Hes a business owner of auto repair shop. I want to put him on child support. Anyone know how much i would get? And i dont have any income at the moment will that matter?