Family Social Worker?

i am 19 years old living in the north east of England and i am currently working iin an office but i really want to become a Family Social Worker i need to know how long it would take to become a registered social worker and wether you can study at home as i need to keep my current job as i have a 4 grand loan to pay off so need the income still coming in - can any 1 help or no some1 that could tell me a little more about it - or no sum1 that actaully works as a social worker please help thankyou x