Watercolour is probably the most satisfying of all mediums. Although difficult in the beginning, after practice its mysteries will unfold, providing the utmost pleasure for the dedicated.
To gain confidence, constant practice is essential. Just as a musician needs to practice regularly to retain his touch, the watercolourist needs to be constantly in touch with the medium.
Your eye level is your reference point for drawing the perspective lines. All lines above your eye level will go down to the horizon vanishing point and all lines below your eye level will go up to the horizon vanishing point.