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

Yoi wil get full knowledge of this exam

Thanks

basically go with any degree you want crack civils so prepare side by