What is the issues?
Don’t rely on ChatGPT, it’s a language model, not an encyclopedia. Start with tutorials. If you want to “make your own ChatGPT” and don’t have any background info, drop that idea for now and revisit it once you’ve gotten started. It’s complicated stuff.
Don’t use chatgpt for this kind of thing. It absolutely sucks for programming stuff if you can’t already spot goofs in the code, because it will make them regularly, and if you can’t spot them yourself, they will torpedo your entire project. Debugging tools will be of limited help.
Start with a project you feel would make your life easier, then work out how you want to get from A to B. Maybe you want something that can fetch you something from the web every day? For that you can look into the ‘requests’ library to make web calls.
If you need help, I’ve been doing Python code for the best part of 10 years. Holler at me if you want help!