WHEN AND HOW CAN I BEGIN TO PRACTICE THE PRELIMS TEST SERIES?

Regardless of whether you pass or fail the UPSC CSE prelims exam, you absolutely must prepare from the mains test series. The rationale behind this is because now, after reading extensively to prepare for the prelims, you are properly conversant in all the ideas and will also keep you connected to your preparation in an integrated manner.
The next question that comes to mind after learning that one should begin with the mains test series is, "How?" Let me correct you on this; there are many online and offline platforms that deal in providing thorough and detailed test series, but the main goal is that you must be able to identify those that are actually good in terms of quality.
Therefore, starting with the mains test series in addition to the mains preparation is the most precise method of preparation. This idea struck me as the best way to get ready for the mains because I had a friend who had prepared for the mains by enrolling in a test series run by EDEN IAS, the best coaching institute for IAS in Delhi, and they include all of the essential and fundamental subjects found in the UPSC syllabus, which will aid in thorough preparation for the exam.

For more info visit: https://edenias.com/mission-prelims-revision-crash-course/