Help a beginner starting this journey

I need to develop of a system that leverages artificial intelligence to extract information from unstructured text documents. In simpler terms, the system will need to read emails, bank transfer descriptions, text documents, etc., and interpret the content to extract information in a structured format according to various rules .

I’ve never worked with ai, and i thoght to work with BERT. Can you suggest me a good documentation where i can learn to work with this technology or even something different to work with if it’s better?

Maybe a little snippet of coding with python would be really appreciated!