Dear brother...you need not dishearten. there is a place for everyone, according to my point of view you should not join any academy nor you need to. what you need to do is to select your optional according to your academic background and try to cover one optional coupled with any compulsory. plan your timetable for each subject. at least 9 months and 8 hour a day is sufficient for getting success. you must give at least 4 hour to English ( Essay plus Composition paper) for which you have to read Dawn, Quarterly magazine by imtiaz shahid, press review etc. you should improve your grimmer through some good grammar books. for recommended books, there are threads for every subject as well as i am there with you for any kind of help... regards

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"Our Lord, give us the good in this world and the good in the hereafter." (Al-Qur'an, 2:201).