Many young students have difficulty in sounding pitches accurately. This will improve with practice and experience. It is important to understand the concept of exact pitches, but not to worry if there are intonation problems at first. Careful listening will help with intonation, but it is best to work with a teacher right from the beginning.
Another important aspect of learning music is the development of a good sense of time. To get on the right track from the very beginning, it is strongly recommended that students use a metronome to play along with at every practice. Electronic metronomes are recommended because they are more accurate than the older wind-up style, and often have a volume control as well as an earphone input.