Is there a way to download all content at once and not worry later?
The game downloads the content over the time if needed. However, if this is your choice, you can inititiate the full download so you don’t need to worry about getting the content later.
Just go into options (Cog Wheel icon in the top right corner of the main menu).
Then tap on “Download all content” section.
Make sure you have at least 1.3 GB of free memory space on your device.