I tried the course, I am a Langchain expert.
It's a bad course, And I was following the maker on Twitter, he's using some very sketchy techniques to promote his things. These guys are not expert at all! Be careful who you are learning from. Better learn from the great documentation and experts like Andrew Ng.
It only a simple course about langchain, for anyone who want to be a langchain expert, just try to read langchain official document and build some application by hands, the official document is clear enough, for me, I am new to LLM tools, but I read langchain document and build my own chain within 2 hours after installation.