Help with postioning and resizing buttons

So I’m pretty new to all this and I’m currently working on my portfolio. It’s a little disheartening to see how far a lot of people are, and I know I’m new, but holy cow, it’s a little frustrating.

So here’s the html:

And here’s the CSS:
#fb-button {
left: 500px;
bottom: -1px;
#git-button {


No I realize this isn’t perfect, and the positioning probably doesn’t make sense. But that’s the problem, I can’t get these damn buttons to move whatsoever. I’m also having problems resizing them as well. I need help.