questions on next_posts_link

Hi, In my home this button will show at the bottom and when clicked it will load a new page with my older posts. Instead, I’d like it not to load a new page but to show my older posts in the same page, just at the bottom of the newer. Is it possible?
I checked some code in wp-includes but didn’t really understand where/how I should change the code.

this is my home page
https://francescosoave.com/

many thanks