I think I may know a part of the problem. Are you using the assignment Navigation Radar? Corellia was the first level that forced me to seek help a few years ago and the first time I learned what that thing was.
You cannot fly around and try to tackle the mission on your own. Timing and sequence are very important! Learn to use the navigation system. The orange field will always point in the direction of your assignment--you're going in the right direction when it's pointing up. When you reach the area of your assignment, the orange band widens and eventually fades, showing you are exactly where you should be.
If you already knew this, I apologize. Otherwise, this may seriously help!
"I am the Alpha and the Omega," says the Lord God, "who is and who was and who is to come, the Almighty." (Rev. 1:8)