I am not able to comprehend RCs , what daily practice should i do to improve it?

Read a good English newspaper daily, and solve minimum 2 RCs daily

this might be a weird suggestion, but try reading 'Sapiens' . The book is being written by a college professor (we get a lot of RCs in CAT from academics and intellectual) , also this book covers a wide array of topics ( History, Technology, biology etc.). The author doesnt stick to a single type of writing style or tone and varies it multiple times, getting you accustomed to different styles. Also it is a great book, so it is easier to read than newspaper or long articles. This is what helped me