Can anyone help me change the buttons around on my blog?

My website is for my company, and one of our pages is a blog that displays a webcomic (we also have another blog page that's just for news). I would like that page (foreignpresscomics.com/fishstronaut) to have buttons on the bottom, either by adding new ones or by adjusting the blog navigation buttons that are already there, for first post, previous post, next post, and latest post, similar to the photo below.