Display 2 Fields Using SalesOrderDetail Table?

I'm trying to Display 2 fields using the SalesOrderDetail table.

CarrierTrackingNumber

Count the number of CarrierTrackingNumber and give alias name of “Count CarrierTrackingNumber.”

I only want to return records where the CarrierTrackingNumber has count = or greater than 2.

Below is the SQL I developed, but I'm getting this error when I try to execute: Msg 245, Level 16, State 1, Line 1

Conversion failed when converting the nvarchar value '4911-403C-98' to data type int.

SELECT
CarrierTrackingNumber,
(
SELECT
COUNT(CarrierTrackingNumber)
FROM SalesOrderDetail
WHERE CarrierTrackingNumber >= 2
) AS CountCarrierTrackingNumber
FROM
SalesOrderDetail