My Family

My family is made up of six people. My dad, mom, sister, two brothers and myself. My father is fifty-five years old. He is a driver. My mother is forty-eight years old. She doesn't work because she has poor health. My sister is four years older than me. She is twenty-six years. She is married and has a little daughter who is one year old. My older brother is twenty-four years old. He has a diploma in computing, but is currently working at a construction site. My younger bro is twenty-one years old. He is unemployed now. :D

My family

My family consists of six people: my dad, mom, sister, two brothers and me. My father is fifty-five years old. He is a driver. My mother is forty-eight years old. She doesn't  work because she have is in bad poor health. My sister is older than me by four years. She age is twenty-six years old. She is married and has a little daughter who is one years old. My older brother is twenty-four years old. He has a specialty operator PC degree/certificate in computer science(I'm not sure if this is what you mean)but he works at the a construction site. My younger brother is twenty-one years old. He is a unemployed now.

My Family

My family consists of six people. Grammatically correct but this is not how we express.  There are six in my family, It is dad, mom, sister, two brothers and of course, me. My father is fifty-five years old. He is a driver. My mother is forty-eight years old. and she don't could not work because of her poor she have bad health. My sister is older than me by four years, . She aged is twenty-six years. She is married and has a one year old little daughter whose is one years. My older brother is twenty-four years old. He has a specialty operator PC specialist but he works on the a construction site. My younger brother is twenty-one years old. He and currently is a unemployed now.

Not bad at all because we can understand you.  However, you need to learn from the corrections to learn how to express more naturally.