This looks something easy enough that even I could try ;-) Thanks for the code.
Then next step would be, to create a 'very important' list of posters that you would want to follow closely and you pass that list into your function and get their last 2-3 posts, so you make sure you don't miss any. I will try this today. And maybe one day also email notification and code running every say 10-15 minutes on raspberry pi ;-)