IPCA European Command: Training Center is the training mission of Syphon Filter: The Omega Strain. Unlike the trilogy, where a training video was provided, players are physically involved in the game mechanics, including fire evasion, hiding a body, general combat and shooting numerous targets within a time limit.
There is no specific guideline that can be provided except for the advanced target range. You will need a weapon that has a high ammo capacity, like the C8 rifle. Sniper rifles are ill-advised due to their scope. Have a look around before shooting the targets so you get a general idea of their position. This is rather tame compared to the true missions so familiarise yourself before gunning through the main game.