Help with Pachyderm theme

Hi, my webpage is https://juzkidzonline.com/
I’m not wordpress or programming savvy…

i’m not sure if i’ve done something erroneous..but i noticed after trying to amend the custom image, the font colour of my custom header changed to a very faint colour and almost invisible..
Q1) How do i change the custom menu font colour, to say, white?
Q2) There is a thick black border at the bottom of the post.. how do i remove it?
Q3) How to hide/remove the “heart shape icon” (comments on <current page>) and “paper with folded corner” icon (permalink)?

Thanks a zillion!