I am in the mold industry, and I began to be an apprentice at the age of eighteen. If you really want to be an apprentice, what you should do now is to find some old clothes, because most of the molds are dirty. As for what should be paid attention to, ask more safety questions after talking to the master! ! ! I didn't mean to scare you. The biggest mold I have ever made weighs nearly 2 tons. It's no joke to put pressure on you! I still pay more attention to safety. Worst of all, I hit my big toe and my toenail cracked into a Mercedes-Benz sign.