Like Doc has said before it is pretty much impossible to train over the internet.
However, just a couple of things that come to mind. Don't get to far ahead of yourself (and dog). Short sessions and consistent training. Don't let issues slide today and get on him tomorrow for the same problem he had yesterday.

To avoid gunshy dogs I always take them to the trap range. As a young puppy he would stay in his crate in the truck a 100 yards or more from the range. I would do this a couple weeks in a row. Then I would take him out on a leash and walk closer to the range and let him watch what was going on. This is good social work too. Now for the bird deal with a starter pistol. His first retrieves with help from a person throwing we only used a quick hey-hey from the thrower. Once he accomplished this with no other problems (coming back and things) we introduce the starter pistol along with the hey-hey. Soon he will hear a shot and ears and eyes are looking for the bird.

The FF deal is program on its own. When I put a dog through this program we don't do much else in training. Depending on how he is doing we might put throw some easy marks to the edge off and improve his mindset. Follow a proven FF program by the letter or you'll have problems down the road.