Dog Training Job - Mayberry Park, GP, 1448

My dog is female and shes 1 year and a few months. She is very aggressive towards other people that come into my space for example my room or work area, my mom came into my room and she almost bit her its been going on for a while now but its getting worse we have 2 smalls kids in the house and scared she will attack them she is also aggressive towards other dogs that come near me i know its for protection but i would love to get her a friend to play with bit if shes like this she will attack the other dog and i don't want that

Shes also very bad as so when i leave or don't come home for the night my parents says she cries and shes restless i want to work on that as well.