Spacing between meta data and text plus removing author

Hello again

How do I increase the bottom spacing between the meta data (date and author) and the copy?
e.g. https://ethicalescapes.org/family-friendly-hiking-routes-around-the-world

And how do I remove the author details from posts? Some posts will be republished content so I just want to signpost to the original content and not add an author.

Thanks!