Help with adjusting the bookmark card

I want to inject some code into a page to adjust the standard presentation of the bookmark card to:

  1. remove the icon, authour and publisher
  2. and ideally uses the extra space to have 4 lines of descriptive text instead of 2.
    The current bookmark looks like this:

    To do (1) I know I have play around with:
    div class=“kg-bookmark-metadata”
    img class=“kg-bookmark-icon” src=“” alt=""
    span class=“kg-bookmark-author”>Boiling Cold<
    span class=“kg-bookmark-publisher”>Peter Milne<

However, as a non-coder, I’m not getting it right.
Any help would be really appeciarted.