Code specialist GPT Chatbot webpage for my existing webpage

Hello

I have a website dedicated to financial services regulation: https://regulatorsweeklywrap.blog/

I would like to create a webpage on it which:

- utilizes GPT Chatbot;
- limited to content on my webpage, and about 10 other webpages only; and
- additional material which post dates June 2021 (when GPT Chatbot finishes). This will comprise PDF documents, which I will compile for you.

I want it to be super simple, elegant and easy to use interface for my clients.

Thank you
Liam.