Can you share what you have already tried? You can read data from a sheet using the Google Sheet node then depending on what you are doing with the data you could then use a Code node, A Set Node or maybe something else then you can use a third party service if needed to make a PDF that you can upload using the Drive node.
Sadly though without knowing what the data looks like and what it is meant to look like at the end along with what you plan to use to make the PDF and what you have already tried all I have is ideas
I would recommend going through the level 1 course though that will give you a good understanding of how to work with data in n8n.