Hello I am mechanical engineer and want to appear for Special CSS 2020 exam in Nov/Dec through Punjab minority seats. I have 5 months for preparation and lot of time to spare.

My optional subjects are
International Relations
International Law
US history (I know US history and I.Law are being targeted for two years but due to shortage of time, this combination seem well to go with IR)
Punjabi

Can you please answer my two questions
1. Advise me on my optional subjects if I can improve this combination? and another subject?

2. Should I join online academy? For 12 subjects or selective subjects?
I was thinking of taking English essay and preci classes along with IR, IL and may be US history.