Helo aspirant, its good that you want to prepare for civil servixes but make sure be patient and confidnen. You would face many difficulties during this journey but just believe in yourself. Here below i have provided the link. Its the bool written by Mrs. Ila tripathi .she has explained it very well that how one can prepare for civil services. Just go through it. Hope it will help you .

Https://www.amazon.in/71-51-Journey-Failure-Success-ebook/dp/B07G2SBQNN

You seem quite interested in a career out of UPSC.

https://competition.careers360.com/articles/upsc-civil-services

https://competition.careers360.com/exams/civil-services-examination

The two links above contain all information regarding UPSC.

You need to be a graduate to apply for UPSC.

Best of Luck