Automated content filler, template builder, ChatGPT type element for my app users

Hi folks,
I am trying to add a chatGPT type prompt to my app and also something that can help me include a feature that creates a template for my users based on this prompt and fills in the information. Is there anything available as a plugin that can or is close to doing that? I will have just a single template with pre-defined sections. ChatGPT type feature should help fill in the template section and suggest a suitable picture based on that regeneration capability.
What is needed at all for me to make this happen inside my app?