IAS also known as Indian Administrative Service is best job in the civil society and to get up to that position people put the most efforts that they can but then also the success rate is just around 1% which means IAS demands a person who can be in that 1% and for that you need to clear your vision and focus on your goal.

UPSC every year conducts exam for Civil Service Examination which consists IAS also.

The eligibility yo become an IAS is that you should be a graduate or in the last year of your graduation and your age should be 21.

Since the syllabus is very vast I would recommend you to go to the official website and download the notification and syllabus and then according to your comfort make you plan and study.

The exam is conducted in two stages 

1) Prelims (qualifying nature)

2) Mains and Interview (affect in your ranking)

I hope I was able to clear your query you can ask me again if you want to know anything.

Best of luck for your upcoming future.