There is an easy way to get your Data. It's just kind of hidden.

It's works the same way as Google Takeout. To get to it do this:

Sign in to your Apple ID account page at appleid.apple.com on a Mac, iPhone, iPad or PC. Go to “Data & Privacy” and select “Manage Your Data and Privacy.” On the following page, go to “Get a copy of your data” and select “Get started.”