First of all,dont worry about your english,its great
You may want to start a new thread in the puppy section or in the stop behavioral problems section,it will be seen by more people and wont be overlooked in your introduction
How old is Dina? She s just a pup,it may take her a while to do what you want ther to do right away on command whithout you having food on you,thats just normal,dont worry
For the biting,she needs to learn bite inhibition,thats very normal,too
As soon as she is making teeth-to-skin contact,stop all the fun,if you can make a high pitched squeal . . . even better,thats how dogs teach eachother,when pups play,they bite and mouth each other to test out their "jaw power" (if that the right word
) and they teach each other when its to hard and hurts,well now its your job to teach her,she will not just grow out of it,it will get dangerous if nothing else when she is an adult
Another thing you can do,just get up and remove yourself,that is the most boring thing for your pup,again this may take a few times,but she will learn
I m not sure about being barked at,whenever Dodge tried to have a barking session at me because he wanted something,I ignored it
try walking away and get really,really interested in like say a toy,she will follow you to see what wonderful stuff you ve got
Last thought I would like to add,forget you ve ever seen CM,check out Victoria Stilwell,she is a possitive only trainer,boy am I glad your girlfriend stopped you,well done to her
Hope this helped you a little,think about starting a new thread and you will get lots of great advice