It takes 1-3 months from an inexperienced apprentice to a junior paperhanger who can independently undertake pattern pasting.

If you want to study systematically, then I suggest you choose a professional school. With the guidance of the teacher, you will definitely improve your learning efficiency. Generally speaking, you can master the basic operation in six months. During these six months, you will learn everything from cake painting to lace flowers, succulents, cacti and zodiac animals.