I do not know how I can create a similar setup in n8n.
My guess is to use a (1) cron and then a (2) g-sheet node to get all data of the sheet.
But I have no clue how I can extract only data of the new row(s).
Hope you can follow so far.
I would be very thankful for any hints
As @rodrigoscdc shared you can follow the article and use polling. The Trigger node is under development, and hopefully will be released soon. In the meantime, if you have any questions on how to implement it via polling, feel free to ask us here