Disassembling parts is the most basic thing. After you have worked for about 2 to 4 months, you will start to get involved in plastic surgery, such as changing doors or something. You can change the sill 1 year and a half, change the rear fender in two years, make a simple accident car, learn from Master Fu by the way, and try to do it alone in three years. Remember to ask no, accumulate experience, and basically become a hand in 4 years.