[Question] Are there good negotiation classes?

In HPMOR there is the notion of Malfoy’s “negotiation tutors”. Are there good classes or private lessons irl that are analogous to that (either online or in-person post covid)?

I’m a shyish programmer thinking about going into a managerial role. Wanted to get a leg-up by training myself to be more social and better at negotiation. I read Cialdini’s Influences but theory is no replacement for practice. I’m not sure where to find such classes since a lot of classes online seems scammy/​low-quality.