Long time lurker, throwaway for obvious reasons.

I have worked on myself for the past two years, and have made a plethora of improvements. However I want to become better with words, more spontaneous, and funny, so I decided to enroll in improv classes. The question I would like to ask is if it is worth paying 350 for 8 improv classes, especially if the teacher for that session does not seem that funny. Below is his youtube channel. https://www.youtube.com/channel/UC7gvrKNSzuqkwWPX5ZYwVBw/videos

I am from NYC btw, so if anyone here knows of any good improv classes, please let me know!