If you want a template designed for blogging Skye, Tudor, and Foundry are blog focused:
https://www.squarespace.com/templates/skye? https://www.squarespace.com/templates/tudor? https://www.squarespace.com/templates/foundry?
You can also pull blog posts into the home page on any blog using Summary blocks.
You can see an example on my website here:
https://www.menadena.com
Scroll down to New at Menadena and you will see a Summary block pulled from the Blog, which you can also visit directly in the Main Navigation.