commands and markers do best as single words. single syllable is best. short and instant and distinct.
"good" is better used for praise than a marker work. the marker is simply to say "you did that right" while praise is used to reinforce the desire to repeat the behavior. I use toys, praise and food rewards depending on the task I'm teaching, how well the dog knows it and the level of distraction.
I know when neighbors down the street come home lol even if it's as small as a hurrmph and looking in that direction. If the neighbors have company I know it.
Here is my boy, 4 years old. SBD Posejpal's Brsingr BN RE THDN CGCA CGCU We do therapy work, obedience competitions, rally, barn hunt, and agility. There are a lot of things you can do with your dog. Socialization will be important if you plan to do herding classes. Even more so if you might want to compete. It's also good simply to have a well-adjusted dog that you can have a dog that can focus with distractions as well as not shut down in new situations.