Regardless of the style of music you intend to play as your first preference, you can learn a lot by studying Classical music. The term "Classical" is very general and covers many periods and styles of music spanning hundreds of years. There are many great pieces and studies by a variety of composers which will help you develop a solid technique and a good understanding of how scales and chords work together to make music. The following example is a study by Carl Czerny, who was one of Beethoven’s teachers. Notice that the chords played by the left hand are written on a treble staff. Although the tempo marking is Allegro, take it slowly until you can play it comfortably.