i am not very good at rc's , so can anyone suggest from where i can read good content to make the habit of prpeparing these rc's?

Hi, you can read online articles from the Economist, The Guardian, Aeon, Smithsonian magazine, etc- these are some of the best sources. Apart from that, solve at least one RC every day. You can take the verbal daily targets regularly, and after the test, analyse every option thoroughly.

You can read good content for free from websites like Aeon, Jstor Daily.