It's easy to upgrade from a free blog to a paid blog inside WordPress.com, Wix, and Weebly. Simply pay for their paid plans. If you want to move from the platforms reviewed above over to WordPress.org, it's far more complex. You'll need to download your website first. Then, it will require a lot of manual re-uploading to migrate to WordPress.org. That's why we recommend reading about how to start a blog for money, where we give you a view of starting with monetization in mind.