Merry Christmas.
Congratulations on the two new careers. My older son did a stint as the AT&T store between careers. While not his favorite job, he did well because he was blunt, but polite with the customers. He did a lot of repeat business because customers liked his no-sugar-coating approach. Not everyone can pull that off though.
Then coincidently #2 son does training films for AT&T stores. His last one you won't see was the Christmas merchandising training. Maybe while you're in class you could ask to see it. He was singing a modified version of The Night Before Christmas.
And congrats on the machining school. When you graduate,maybe you could work for the CNC manufacturers as a tech sales or trainer. That's an option instead of as a user/op.