How to sketch my dad?

He is 48 years old, short and thin, and his sparse beard doesn't match his age. Because of hard work, his black hair is mixed with some white hair, and the whole person looks like a vicissitudes of life. People call my father Master Wang because my father is an auto mechanic. Four people in my family live by their father's skill. Repairing cars is a dirty and tiring job, and it is very hard. No matter spring, summer, autumn and winter, my father has to climb under the car, get into the car, squat down behind the car, unload bad parts, install good accessories and repair various vehicles with greasy hands. Every day is the same, cars come and go, every day. Every time I look at the driver's satisfied expression and listen to the driver's words of thanks, my father is very happy. I watched my father happy that he had repaired the car, and at the same time I watched his repaired car running all over the street. Suddenly I feel that my father is great and amazing, and I am proud of having such a father. Although my dad is an auto mechanic, he does dirty and tired work every day, but he always comes back from work in a suit and his fingers are out of oil, you know. Father's constellation is Virgo, because Virgo loves cleanliness. Every time I go home and see the relaxed and satisfied expression on my father's face, I know that my father has completed the "task" again. I feel very practical and happy. This is my father. I love my father.