Allow users to reate their own blog

Hey ??
So you need a Plugin for Guest blogging ??
https://www.shoutmeloud.com/most-useful-wordpress-guest-blogging-plugins.html

Hello,

Try using this plugin Peter’s Collaboration Email This method is useful only if you are using the account-based system for accepting guest posts. And, you need all guest bloggers to be registered as a contributor in your blog. Once you have installed the plugin in your blog, instead of the publish button, each contributor can see the ‘Submit for Review’.

i hope this helps.