Civil Servant (IAS/PCS)

Hello Himanshi,
In my opinion, BA (Hons) is better than BA as far as UPSC civil services preparation is concerned. UPSC requires Something of everything and everything of something.
You should have a very good command over general studies with the current affairs.
Everything of Something:
Here something is your optional which covers pretty good marks in CS Mains. It doesn't matter if you have best resources UPSC is the toughest exam of country at present and quicker you start the better you will be prepared
Coaching institutes these days can help you with a part of your coaching but in the end its time and hard work you put in that matters. Wishing You all the best for your future endeavours.

Here is the list of the top four institutes for IAS exam preparations:
Paradigm IAS Academy
Established in 1994, it is one of Pune most prestigious destinations for UPSC entrance exam preparations. It provides a good collection of study material that is properly streamlined according to difficulty levels and various subjects. Since General Awareness is a key portion, Paradigm has rested its focus on enhancing a candidate's general knowledge. Abhyankars IAS Academy
Formed by Ajit Abhyankar, who himself carries substantial experience in appearing for civil service examinations, Abhyankar s IAS Academy has candidates achieving ranks in the top 100. The study material here heavily rests on frequent tests and mock examinations. Students are advised to extensively follow newspapers and keep themselves updated about the most influential events. Study Circle
This has rich experience in IAS exam coaching for over five decades. Established in 1953, Study Circle has been reviving its course contents regularly to match changing trends. Besides assisting candidates in brushing up their general knowledge, the institute provides sufficient training for improving interactive skills and other significant areas. The study material is prepared both in English and Hindi.
Chanakya IAS Academy
The course duration is unique, with batches for one, two and three years functioning successfully. Such long batches help weaker students in working on their skill set more effectively. They have a good track record of producing students who get top ranks, the highest being rank three.

Hello,
Believe me, it's the best time to start your preparation for civil service! You have 2 and half years to study. If you plan properly, you can clear UPSE in your first attempt. It doesn't matter, what degree you are doing. It's your dedication towards the goal reaches you to the goal.I will explain, what I will do if I am in your situation.
1. First I analyse myself about, why I want to become civil servant (15 days). By the end of 15 days, I will have my goals after becoming civil servant.
2. As a second step I go through the detailed syllabus of the 3 rounds of the exam (1-2 weeks).
3. My third step will be clearly analyse the question papers and understand, what I have to focus more and what not (1- 2 months).
It's a very important step.
4. Then I will start reading Hindu newspaper almost 1 hour / day. Remaining time I'll spend with NCERT books. I will also start spending my weekends in some of nice websites and magazines for UPSE (6 months).
Oh. Don't you have time to do all these? Come on! Many people including me do all these while working and student life is much better than working. Still you will be having more than 1.5 years.
5. Now you'll be comfortable with basics. This is your second phase of studies. Go through the blogs of toppers. You'll come to know, what reference books you have to study. Prepare those.