Hey my iPad has been stolen how could I find it to get it back

If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

mind you for you to track it, it needs to be powered on and connected to the internet, if it's an wifi only ipad it does not have gps so it will only know its position if the router it's connected to can provide a location.

Here is Apple’s advice for lost or stolen devices:

If your iPhone, iPad or iPod touch is lost or stolen – Apple Support

Use the Find My app to locate a lost or stolen device – Apple Support

If the Find My iPad feature was enabled prior to it being lost, then if active, you would stand a good chance of locating it. 

However, if the feature was not activated prior to being misplaced/stolen - or the iPad has been inactive for more than 24 hours, the last known location will not be available - and the opportunity to use technical means to recover the iPad have been lost.