You can not change back to human form until this fight is over, but you can fly away behind the battle tower, etc.
Keep moving; hit target lock for towers/nests and circle around while holding the Fire Breath trigger/key down. Once you take out most of the opponents you will automatically return to the battle tower.
You should have one skill point that you can put into Dragon Spirit, and can get a second dragon skill point if you explore the fjords before getting the tower.
On the Xbox, a burst of speed is triggered by the left shoulder button. On the PC this is done by right clicking or hitting the 'E' key.
first time dragon help needed pleaseWhy is dragon so hard?