Probably not a Dutchie/X, but I would recommend doing a DNA test if you want to be sure and before calling her that. She looks very stout and broad chested, like a bully/X (also shape of chest, muzzle, rounded ears, etc.). But I could be wrong on both counts and a DNA test is a better way to evaluate. Very very cute though!
Reactivity can be a real challenge to deal with. For dogs with severe reactivity (ex. reacting at every dog or person they see), it can really cause anxiety in the owner and limit where they can take their dog. Training can help, of course. But it is definitely a journey that can take months, not just something that will go away with love and obedience. I generally steer first time dog owners away from dogs with severe reactivity, but knowing nothing more about you or this dog... I wish you the best of luck with your decision!
Reactivity can be a real challenge to deal with. For dogs with severe reactivity (ex. reacting at every dog or person they see), it can really cause anxiety in the owner and limit where they can take their dog. Training can help, of course. But it is definitely a journey that can take months, not just something that will go away with love and obedience. I generally steer first time dog owners away from dogs with severe reactivity, but knowing nothing more about you or this dog... I wish you the best of luck with your decision!