I am using the default WordPress 2016 theme. EDIT: I figured out how to. I just created a text widget and added the code to that. I didn't realize there was a text widget option. I thought that I could only add a custom link widget. It is working now. I still have one question. Is it possible to make the social buttons larger? Also, the social media logos aren't centered in the middle of the icon. Is it supposed to be like that?
You mean, something like this? http://www.wpbeginner.com/plugins/how-to-add-social-media-icons-to-wordpress-menus/
Go to your Customizer → Widgets in your homepage, find the Text Widget, and drag it into your sidebar or footer. For the image URLs, find the Twitter icon in your Media Library and click “Edit.” Then, copy the entire File URL here: Repeat with all of the links and image URLs. or add plugin