No difference at least in the United States. Some doctors might be called "general practitioners" and those are different, but family medicine and family practice are the same thing.
a doctor that isn't really specialized in anything specific and they just are kinda like the people that check you and tell you where to go when there is something that you need more professional...
I would argue they say this because Doctors only "practice" and not "perfect" the art of medicine. The art of medicine is a neverending science into unknown depths and challenges. No operation is...
Yes, that is a possibility. However, many cannot do this because of the expense involved in running a solo clinic and often collaborate with other doctors within medical groups.