I am always fascinated with the songs which have some elements of Hindustani Classical Music. I want to learn more about the core or the basic elements of the same. I have tried to read them on Internet but being a beginner I get lost in the very beginning of otherwise a detailed article. An explanation in layman terms will be highly appreciated and helpful 😀😀
The raga is one of the fundamental elements of Indian Classical Music as you may have already encountered. To get a feel for this concept, I recommend listening to non-classical / semi-classical songs based on the same raga. In doing this, you will notice similarities and patterns.
Only after this, I recommend looking into the notes of ragas that are now familiar to you. Yaman, Bhairav, Des, Malhar, Bhoop, are some of the most commonly encountered ones. Look at some YouTube videos introducing them.
Overall, listening will help you grasp faster than reading long articles, which may add value at a later stage. Good luck!
Neeraja is right that the Raga is a key part of Hindustani Classical music, but it's only half the picture. The use of tala, or metrical system, gives Hindustani music its sound of rhythmic complexity: https://en.wikipedia.org/wiki/Tala_(music)