In order to actually send campaigns, you need to configure your sendy instance for this module:
Syntro\SilverStripeSendy\Connector:
installation_url: 'https://sendy.yourdomain.com'
api_key: 'XXXXXXXXXXXXXX'
brand_id: 1
If your name and email stays the same and you do not want to always repeat them, configure them as defaults:
Syntro\SilverStripeSendy\Model\SendyCampaign:
defaults:
FromName: Your Name
FromEmail: helly@yourdomain.ch