Hi Dheeraj,
Managing several bookings for taxis and hotels on your own may prove to be slightly difficult. The best way to go about it is to book a comprehensive tour package that will help you navigate your trip. Most of the packages are customisable so if you want specific additions to your itinerary, that shouldn't be a problem either. I have attached a few of the top Leh packages below. Hope this helps.
Have a great trip!