Use this audio track to learn the basic melody of both parts of the tune. You should ignore the ornamentation and variations at this stage and concentrate on a good understanding of the melody and rhythm. Premature work on ornamentation can allow bad habits to creep in and go unchecked. In my opinion you should introduce these at the 80% stage, when you are more comfortable with the tune.
Far more important at this stage that you concentrate on a steady, controlled rhythm.