The use of a telescope can be intriguing and even overwhelming for a person who is new to the interesting field of astronomy. This is a hobby that takes time to develop. A beginner needs to first learn the concept of dark adaptation. Using the telescope for a long time can be harmful to the vision.
Hence, beginners need to take short breaks every 15 to 20 minutes and do some eye exercises. It is also important to develop the habit of recording observations in an observation log. While this may seem strange at first, its importance soon becomes known with time. It also becomes second-nature.