Feedback on my tribute page - David Attenborough

hi everyone! this is my first attempt at the tribute page: page

i only used bootstrap for the look.

any feedback is most welcome!

i have two questions:

  1. does anyone know how i can center the card without using container-fluid?
    2, if i try to give a background colour to the card (not the whole page), with bg-secondary, the
  2. objects still have white between them. does anyone know how to solve this?