Hope you’re doing great!
Every block has got it’s unique ID in the page
so for example, if the button is intended to anchor an image below in the page
you need to find the ID of that image block (you can set it yourself in the block options) for example ‘anchor-one’
after that, set the button link to be #anchor-one
That should do.
Please let me know if I wasn’t clear, and always know that I’d be happy to log in and set it for you 🙂