@sajhamitra.....Vedas itself is so vast that it is like diving in a vast ocean. Ordinary person just don't understand where to start from. The language of Vedas is Sanskrit. How many people in Nepal and India know Sanskrit? Is Sanskrit commonly spoken language in Nepal and India? No. This is another difficulty. Even if you start reading English translation of Vedas, you might have different interpretation. This is another difficulty. For example: In Svetasvatara Upanishad it says: Na Tasya Pratima Asti. Many people translate this as "It has no Image" and use this verse saying idol worship is prohibited in the Vedas. The real translation of the verse is: "There is no one equal to it." So, there are many technical difficulties considering the codified language of Vedas itself. Many simple words and joined together to make very long words in Sanskrit, so it becomes very difficult for a layperson to begin with. If schools in Nepal and India start Sanskrit education from early childhood starting class 1, then when they reach 12th standard they would be fluent in Sanskrit and can study Vedas by themselves. Studying Vedas in Sanskrit has its own benefit. The words are arranged in such a way that correct pronunciation of Vedic mantras bring special vibrational effect in mental and physical body. You can experience this yourself. Chant the Purusha Sukta and experience the effect yourself.
Also, there are many reasons why people are not following Vedas these days. The administrative system(government) is alienating itself from the Vedas and they have not brought any systematic education system of Sanskrit in the schools starting childhood years. Learning language in old age becomes difficult and one lose interest in it. So, childhood is the best period. Government of Nepal doesn't seem to care of Sanskrit education in Nepal. This is creating Nepali children to learn only Nepali and English.
Another reason is that India and Nepal is heavily influence by western globalization these days. We like to talk in English, we like to listen English music, we like to eat burger, we like to east pizza, we like to do many western styles. As a result of this Western Influence, children are forgetting their own roots. If you ask a child where does a tomato come from? He might reply: From the grocery store! It a completely different way of life where Vedic study seems uncool and boring. What are your values in life? This value makes where you go in your life. So, people do not follow Vedas for various reasons. There is no one particular reason.

@sahibaba....The language itself clarifies what Paramanu is. Param + Anu = Paramanu.