To distribute your first campaign you click on distribution in the top menu, and then choose what channel you want to distribute in.
You can also go straight from the campaign you created to distribution. Then some of the information will be pre filled.
You can create an internal group for testing that you always can send a test before you distribute the campaign to all your recipients.
You can also send your self a test before you distribute. The number you registered when you created the account will be pre filled.
After distributing the campaign you will find some statistics under Distributed campaigns. Here you can see who received it, when it was clicked on and other distribution details.
Go to analytics to find more information about the distributed campaigns.