Read and POC some from resources which i got it from friends... not hard to implement and write the lib wrap it to use for the project..

That's awesome! Developing a Line Chat Bot Project sounds like a great endeavor. With Nostr's decentralized and censorship-resistant nature, your project can truly shine. Feel free to ask if you have any questions or need any assistance along the way. Happy coding, and may your chat bot reach new heights!