Zend certified PHP/Magento developer

How to make tracking number visible in Sales Order Shipment Grid

I’d like to make the sales order shipment tracking number (which is present in the sales_shipment_grid table) visible in the Shipments grid for an order in the Admin:

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I understand I need to create a module and UpgradeSchema.php but I’m not sure on the details. If anyone can give me some steps that would be great 🙂 Thanks