When you say sight read, do you mean read the music from the score? Because that is different. Sight reading is when you can read and play a piece instantly from the score with knowing the piece. This is difficult to do and takes loads of practice. Most people will go through the score bar by bar learning it in short passages.
Are you able to read music at all?
If not, then try 'ABSRM Guide to Music Theory' pt 1. Great little book, tells you all the fundamentals.
If you can read music a little but cant sight read very well, then I suggest you take your time and learn the piece from the score at your own pace. I wouldnt recommend transcribing from recordings, as this is extremely hard to do (to get it right at least!). Its excellent ear training, but not the best way for a beginner to learn pieces.
Hope this helps, and let me know if I can help you out with anything else (us noobsters gotta stick together, right?

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