First, I would have to recommend you get a teacher, who can instruct you and build you up to where you can play pieces like this.
My general approach to learning new pieces is to sight read them first, even if this reading is well under tempo. This way you get a general idea of the piece, its challenges, where you need to consider precise fingerings, what the dynamic and emotional narrative to the piece is, etc. If you can't do this, it's a sign that the piece will be quite a challenge to you, and you should consider simpler pieces to build up your technique to the point where you can play the work. As a beginner, analysis-wise, I would keep an eye on the general structure of the piece, what its melodies/motifs are, what kind of accompaniment there is, and the harmony on a bar to bar basis. As you get more proficient with music, your analytical eye will sharpen, and these basic analytical awareness will become second nature, and you can focus on greater analytical and musical detail. To play this piece, you should be able to play chords and voice a melody over the chords at a pretty quiet dynamic. You also need to be able negotiate leaps in the left hand while using the pedal, so if you're a beginner you should practice the piece hands separate. It's not a technically demanding piece, but being able to leap with your left hand while keeping the melody stable and using the pedal is tricky at first.