when they are first born they need to be fed very small food, microworms i think. a few days later they can eat newly hatched brine shrimp babys. try asking in the south american cichlid section for more help.
Before you jump into breeding Rams and asking how to raise fry - have you ever actually successfully kept Rams in your water ? Do you know if they will thrive in the water you can provide them ? They do not appreciate hard water etc. so do your research on the adults before you even start thinking about fry
Do some searches here on TFF and then if you have specific questions, The New World Cichlid section would be a good one