@JoYo You may start with models already trained by other. Explore #LLM or other #foundation_models build demos for you company with #gradio on #huggingface could be a good start, or consume an API from some cloud provider, if that is an option.
But most likely you want to use some of your own data to fine-tune a pre-trained model to get best result. You could learn how to do this with some of the public datasets available at #huggingface or other places...have fun!