Choose the right platform
You probably don't see the forest through the trees anymore. That is exactly what is available with Content Management Systems, in short CMS. A CMS ensures that you can easily manage your blog to provide it with new blogs. WordPress and Joomla! are two large CMSs that can be used. In addition, you have numerous smaller systems that can do roughly the same: Blogging!
What is the best platform?
I can't say that one system is better than another, because that has to do with personal preference and the requirements you have. Take a WordPress as an example. About 50% of the website runs on that system.
Is it the best with this? Maybe it is. It has advantages, like a lot of plugins, a lot of (free) themes and you can find a lot of information about it. But it also has a big drawback, like security. Because a lot of websites run on it, it is also more interesting to hack a WordPress website.