AOA,
Well, dear brothers to start is very important part of gear a study schedule. For study plan and to know better that what and where to start first and then study other topics accordingly, you need to go through CSS past papers of all compulsory as well as your selected optional subjects. First you may cover topics which are being asked in the past papers and there is a reasonable number of questions which are repeatedly asked as well. So, 1st you guys prepare that and then move ahead.
Like in everyday science, contribution of Muslim scientists in science, short notes on human body organs, plants, planets, animals, scientific and computer terms, abbreviations, etc are important for exam point of view.
So its better to 1st prepare such questions and then move to others accordingly. For English essay, precis and composition paper, study plan is to practice more and more. English is very technical subject and demands a lot of practice. You should study English daily. Read DAWN newspaper to polish your English proficiency, knowledge and vocabulary. The more your practice, the greater you improve your English and writing abilities as well
Follow below link:
www.cssforum.com.pk/#css-past-papers
Good luck and remember me in your prayers
Profound regards,
RMKamran.