Yeah, shooting or running, or making a melee attack is not using the order. Issuing the order is using the order.
You could then (if you wanted), give take aim, and bring it down to the same unit, allowing the re-rolls to hits and wounds. Unlike in 7th, issuing the order doesn't force the ordered unit to immediately fire it's weapons. That's why the bonuses all last until the end of the phase.
The only orders which force a unit to activate, are move move move, and fix bayonets.
Granted, you normally cannot issue multiple orders to one unit, which is where that relic comes in. Although, to be fair, you'll probably always take the relic to steal your opponents command points.