Are Westies Good With New Puppy’s?

I have a 8 year old female westie that has been fixed that lives inside and I am thinking about getting a male German Shepherd. Im worried about her reaction towards a new dog. I am also worried about not being able to show her as much attention when the new puppy arrives because I know I will be spending lots of time training and exercising with the german shepherd. Please let me know what I should do.