Asalam o alaikum respected seniors,
i live in Karachi and i have done MBA in finance from university of Karachi with 3.8 CGPA.
now i am going to start the preparation of CSS. I want to qualify it in first attempt. your suggestions regarding subjects and their way of preparation will be really helpfull for me.

Wa Alaikum Salaam ....!

It is dream of all individuals to clear CSS and clearing in 1st attempt is an honor which everyone wants. We all are on the same boat.

1st step is to read rules to determine your eligibility for examination.

http://www.fpsc.gov.pk/icms/admin/we...2017-Rules.pdf

Please note: Age limit is 22-30

After that you need to select subjects.
Here is syllabus.

http://www.fpsc.gov.pk/icms/admin/we...%20onwards.pdf

Go through syllabus in detail and choose your subjects by keeping following points in mind.

1- Rules of choosing subjects from each group
2- Your academic background
3- Your aptitude
4- Your interests
5- Scoring Trend (You have no idea about it so, I will help you with it later)

Make a list accordingly. You can short list more than 1 subject from each group just for suggestion purpose. After that I will help you select the best option according to scoring trend as well as your interests, aptitude and academic background.
I can suggest you general scoring subjects but it is not a wise approach since I have no idea about your interests and aptitude. I am also a business graduate. I have done M.Com (I am Gold medalist of my batch) and now doing M.Phil in accounting and finance. So, we have same field.
After subject selection a will guide you about preparation.

__________________
WA-TU-IZZU MANTASHA; WATU-ZILLU MANTASHA