Breast milk is the best nutrition for baby till 6 months of age.
Next Steps
After 6 months- consider introducing semi solid foods in a staged manner along with your breast milk-
start with rice, rava ganji, then mashed cooked vegetables mixed with rice and ghee, banana , curds and dal
Later u can start with egg yellow by 7-8 months Continue breast feed 1-2 times per day
Health Tips
DONOT GIVE COW/BUFFALO MILK till 1 year of age to prevent developing allergies.
By 1 year of age your child should be able to have a family pot diet- exactly what you consume!