Yes when I started my preparation I was confronting with same problems. It is natural, in the beginning one has no clue from where to start, on which points I should work hard and which point is worth to skip.
Any ways what you need is to get adhere to your study. Read each thing as many times as you can can so that it may become familiar to you and then you will find it easy to jot down over this topic thoroughly.
With the passage of time you would be able to overcome on all these problems, which every aspirant confront in the very beginning.
Regards

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Asma Morio