what is the difference between garden soil and farmyard manure?
How to prepare soil for potted plants and grass in this monsoon season?
Garden soil, or topsoil, is a mixture of organic and inorganic materials, broken down in different ways and different size particles. Farmyard manure is manure fresh from the animal, so to speak. In order to be useful to plants, it has to be further broken down by microbial action. This is accomplished by allowing the manure to just sit for several months to a year, or by composting. This article tells you more about that: https://www.gardeningknowhow.com/composting/manures/
Soil for potted plants is called potting soil, and is quite different from garden soil. There are many different recipes for making potting soil, and this article will tell you more about that: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/using-topsoil-and-potting-soil.htm
Preparing soil for grass pretty much depends on the kind of grass you are using; and the aspect of the monsoon season I can't tell you anything about. Perhaps you can seek more information from your Indian Council for Agricultural Research, who might have information available for private people. If not, you might seek assistance from local botanical gardens or university botany departments.