Hi April
All templates do have styling included for Joomla's blogging features. Having just a blogging page would be down to how you set up Joomla by just using the blogging features. I would say that Joomla might be slightly overkill if you just intend to use your site for blogging. It may be worth considering something like Ghost (
https://ghost.org/) which is strictly a blogging CMS which is does very well.
Ciarán