Then, setup the cloud sync account in the app's settings. This will create a copy of your data in your own cloud account, and will allow to sync the changes with other your devices/PCs. This will also allow to restore data on new devices.
Finally, press the PLUS button, select Add Card, and choose a desired data template. Fill it in and save. Now you have a first data record (card).
Use the search field at the top to quickly access your data.