looking for roots

i was born in brooklyn 1956, adopted through angel guardian home. non identifying info. states mother was 24 at time of birth, had 6 yr. old daughter mary ann, living with her. my grandmother had severe diabetes, grandfather was at one time a painter. they had 6 children total, 3 girls, 3 boys. i am looking for info. on the moran family. my name was josephine at time of birth. i believe mary ann still lives in park slope. would love info. on my roots. my other half sister was born 1959 and also adopted through angel guardian. please, any info. would be so appreciated. also belive the addresses they lived at were 454/466 9th st. thanks.