If you watch videos, you can see how to differentiate between regular routes and village routes.Satinder ji... sounds scary. I have downloaded offline google maps. Still confusing to see small paths intersecting the road on satellite images. It seems hard to differentiate the national highway and the road to villages. It is all looking gravel pathways.
Watch Routes on youtube videos. You will get better idea. When you are visiting is peak summer time and mostly people from plains prefer to go Ladakh. You may find some taxi person or others after some km to guide. Hope for the best and try to make points where you can get lost. Preparation can be done earlier if you watch videos of Ladakh.
As I said earlier, try to be with others at most places in Ladakh to get cheap accommodation & experienced persons may know about routes also.