Previous/Next blog post pages

Hello,
I am using a theme on my blog at https://creation-1.com/blog that I like but the only problem is that it doesn’t have the ability to navigate to older posts at the bottom of the home page like most themes do. Is this simple to add? Can I just copy code from another theme? Can someone point me in the right direction here? Any input or advice would be appreciated.
Thanks a lot,
J