So currently my blog post has a "Pages: Next page" at the bottom of my blog post by putting <!--nextpage-a-> in the editor where I wanted to stop the first page and putting <?php wp_link_pages( array ( 'next_or_number' => 'next' ) ); ?> in the single.php file.

Now if I wanted to make the "Pages: Next Page" a button with "Next Page" instead, what should I do to achieve this? I'm not super familiar with Wordpress codex and I could only come up with wacky solution like putting a image file that looks like button that links to the next page but I would like to make it an actual button instead. It doesn't even need to have the previous page button.