I have been an apprentice in a screw factory for the third month, and other apprentices won't say anything!

Seriously, this business is ok. If you want to learn a thing well, you must first cultivate your interest, otherwise it will be difficult to get started. If you're really not interested, go ahead. But now you are more confused, and you can't even say what you like to do. There is nothing to be embarrassed about. The boss will never have feelings for you. Also, when you come out to work, you must be prepared to suffer indignities.