Private Session messaging
Beginner 10'
The Collectif recommends Session as your everyday messaging software. You can find a comparison of the different messaging systems at PrivacySpreadsheet.
Download the application corresponding to your platform and install it. In our case, we're using Windows, but the process is the same for other platforms
Once installed, click on "Create an account".

Before you can create a message, you need to add a new contact. Click on "New message"...

Video tutorial
Messaging tutorial SESSION incensurable! - 12 min - stop Telegram censorship #paveldurov