UPSC Civil service exam is one of the most prestigious exam, and with number of candidates increases every year makes it highly competitive, the syllabus is extensive whether it's prelims or mains,hence it's best to have an integrated approach while preparing for this exam, UPSC takes two year that is one year to prepare and another year to appear for the exam,so PERSEVERANCE is the key to success in this exam, you need to have a disciplined life in terms of daily,weekly,monthly targets if you miss you'll lag behind to complete such a humongous syllabus, you need to solve mock tests and do test series, also practicing answer writing in advance is a must.This exam tests mental capacity of candidates because in this two years of preparation period,you'll have moments of anxiety and doubts, so it's important to have a balanced mind, doing yoga and meditation can help you a lot dealing with things going on internally,also you have to take care of health,eat healthy food and sleeping on time, at the same time you also have to balance out your studies with other things,it can be your hobby, it's just that you have to keep up that enthusiasm alive which made you choose to appear for this exam and and afterwards have a career in the same.
To become an IAS officer, you need to clear the Union Public Service Commission Civil Services Exam. There are numerous students who attempt this examination every year, but only a handful of them get selected.
You need to work really hard to clear the examination. It is very important to practice and study a lot to clear this exam.
Hope this answer helps!