Poe.com is great for all manner of learning through a chatbot. It’s got like a dozen different models that are great for answering natural human questions. You know like the one’s you used to be able to answer through a web search without wading through pages of BS that don’t actually answer the question. You might consider double checking it with a search engine or a different model to help cut out on any hallucinations it occasionally has.
It’s also got some image generators to play around with, but they aren’t really useful for learning.