Just like if you don't have the basic knowledge of tattoo technology. You can learn it completely in about half a month to a month. If you want to major, I suggest you find a professional and formal training school and a better teacher to teach you one-on-one, so that your professional skills will be more comprehensive and solid. Generally, there are semi-permanent professional and technical courses, from one month to two months and three months, mainly depending on our future career development direction to choose the courses that suit us.