ami on Family Tree Circles

i am looking for my dad and nan, but im finding it really hard as i dnt really know anything bout them all i really know is that. their names are david charles price and mary kimpton or kempton and that my dad has more thatn too kids thats me ami mary price and my brother david james price and i think he has a son and a daughter and he used to have a girlfriend call joanne. as u can see i have little information bout them andd i am hoping to find them but i cant seem to get anywere. please help if u are realted please let me know. thankyou btw my name ia ami mary price born in peterbrough and my mums name is nicola steel and im 18 born 26.08.1991