Beside the chat in every area of work you will find the Tasks tab: ready-made pieces of work drawn from the industry knowledge built into that area.
Select one, or several at once, and run them. The results come back in the chat, and you then instruct the assistant on what to bring into the document, just as you would with anything else you produce in the chat.
Tasks are a starting point, not a constraint. Use them to get going quickly or to cover ground methodically, and chat freely around them whenever you want to take the work further.