Hey Paisley, welcome to SpaceHey!
I took a look at your profile and was able to get the CSS of your page to look at exactly what you had currently set up and what you don't. You are off to a good start but I think I can see why updating your contact section isn't working well for you.
I think you're missing the !important tag which updates the property over other things that might be trying to update that property too. To explain this properly I would recommend you look at this page:
https://www.w3schools.com/css/css_important.asp (also, w3 schools is how I got started in web design which I do as a side-gig, so going through their introduction to HTML and CSS isn't a bad way to go about learning this stuff :) )
Anyway, as far as your contact section goes, here's what you can do:
In your CSS in your About Me you have a section for .contact, add this property to your .contact element:
border: 2px solid white !important;
Next, below this .contact element section add this, which will update the background color of the heading of your contact section:
.contact .heading{
background: white !important;
}
Finally, to update the link colors, use this below that element:
.contact a{
color: white;
}