Cameras require a video service add-on. If using an Alarm.com compatible doorbell camera only (no other cameras) you need the Video Doorbell Only Add-on.
Changes to your service plan are made through the System Manager feature of your Surety account. This process can be done at anytime.
Once added, video doorbells are paired via the Alarm.com mobile app. A variety of guides for video doorbells can be found here:
https://support.suretyhome.com/search?q=video%20doorbell%20%23how-to
What lights are you referencing? Z-Wave lights would be paired to the panel first. Z-Wave Programming steps are found on the support site as well: