I want to create a modal or popup.

So far, I’ve only implemented a login modal using Blocksy, and I haven’t created any other types of modals on a page. I’ve tried searching for solutions, but it’s been challenging to find clear guidance. Even when I attempted to use a popular modal plugin (Light Modal Block) with a button from Stackable, it didn’t work as expected.

I would appreciate any advice on how to proceed.
Thank you for your time and effort.