When they are doing massage, you should watch carefully and go back to practice seriously. You can download many massage teaching videos online and practice with yourself. First, practice basic skills on rice bags. After a little effort, practice on relatives and friends.
Remember the essentials of massage: lasting, powerful, even, soft and deep. When practicing by yourself, compare these words to see if they don't match the main points. Ask the teacher in the hospital if you don't understand. Self-study reading, watching videos, with some basic skills, plus the guidance of teachers. Generally, I will practice for half a year, and basically it will be fine.
You can buy a massage textbook from the bookstore. There are also textbooks on acupoints.
When you get there, you must remember to be modest, serious and hard to win the favor of the teacher.