You may create an unlimited number of Sources of any type. Creating a Source starts with choosing a type and setting a name. Configuring a Source depends on the Source type's available options.
Sources are available to collect Events immediately.
You may update any Source at any time. A Source's available options are dependent on the Source type.
Each Source that receives Events has a live Event Debugger which will show you Events that are flowing into the Source. The Event Debugger updates every 5 seconds, and may be paused using the Live/Pause toggle above the list of Events.
Some sources have instructions on how to configure the Source, such as how to install tracking code on a website when using the JavaScript Source. These Sources provide a Setup tab with instructions on how to move forward.