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

Thnks

It depends on your interest. In order to apply for UPSC exam only you should be graduate in any of the field, You can check the complete eligibility for UPSC Entrance Exam with the given below link.

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

You can also check the syllabus & Exam Pattern of UPSC with the given below link.

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

Good Luck!