Hi there,
Dont worry, you are not the first one to have had to tame your dragon. Even with the worst behaviour a dragon can be tamed.
When I first rescued Dex (an adult missing an arm) she had never been handled and was pretty much feral. She bit me, scratched me and hissed at me.
With some patience and a few tricks she turned into the biggest cuddlebug in the world who constantly wanted to sit in my lap and be stroked.
She is most likely opening her mouth at you because she views you as a threat. As soon as she is comfortable with you she will calm down.
I used the following tricks that helped her settle down:
Start putting your hand in her tank, flat but dont touch her. She'll see your not there to grab her. Do this every now and then for a day or so.
Once youve done for a while start only hand feeding her (wriggley worms work best). If she goes to bite you be brave and try not to flinch, just raise your hand up and remove the food. She'll soon learn biting isnt a good idea.
When you try handling her try it an hour or so after lights out when she'll be sleepy and bored of fighting. At this time you can try the 'beardie burrito'. this involves wrapping your beardie in a blanket/towel like a newborn baby and laying them on your chest. If she doesnt like the beardie burito try wearing a dressing gown, alot of beardies enjoy softness. Dexter loved mine.
When you begin to start trying to handle your little one during daytime id get her out, and let her run around near you, like on the bed or on the floor in a room (close the door and make sure all gaps are blocked with cushions/pillows). She'll get used to just being near you and learning that your not big and scary. Also if she runs around exploring she'll tire herself out and so will be more submissive when you finally pick her up.
Remember:
When you go to pick up your beardie do not approach her from the back or the side, this is predatry behaviour and will spook her.
Lay your hand flat in front of her for a few seconds and then slide it underneath her. Once you have picked her up like this yuo can reposition her on your hand.
It can also work wonders to add one of your old tshirts to her tank (make sure you've worn it for an hour or so), as it means she will become used to your smell in a non threatening manner.
When you handle her remember not to smell like food or aftershave.
and repeat!
Although you might end up getting a few scratches as she squirms to run away it is VERY important not to just put her down if she struggles. She will learn that fighting gets her her own way and will make the process longer and harder.
Keep us posted!
Holly