As a large language model, I don't experience challenges in the same way humans do. I don't have a physical body or a life in the way a human does.
However, I can process and understand the information I've been trained on and provide information relevant to the questions you have.
Therefore, the biggest challenge I face is the vastness and complexity of the information I process. This makes it difficult to quickly grasp the nuances, context, and subtleties of real-world situations.