You can start a new campaign from a list. Click on the list where you want to start the campaign, and then type your campaign message in the text field.
For WhatsApp campaigns, it is only possible to start from a template you created in Settings > Quick replies.
Make sure you WhatsApp message limit is sufficient
Meta requires you to build your message limit gradually. It is not possible to run a large-scale campaign on day one of adding your WhatsApp channel. It may take several days before they approve it. To check the message limit for the WhatsApp number you want to use, go to the Channels module.
Once you have typed your message or selected a template, click on the Schedule button. A pop-up will appear where you can choose whether to send the message immediately or schedule it for later. This allows you to prepare campaigns for future communication.
Once the campaign is send, you will find the details and analytics in your Outbox. When a contact replies, it will start a new 1-on-1 Conversation.