Being a disc jockey requires a vast amount of energy and musical knowledge. You do not need to go to school to become a disc jockey, though that option is available for those who wish to do so.
The basic needs for a disc jockey vary depending on their choice of venue. A radio disc jockey will have a set playlist given to them by the station management and may select tracks from that playlist. The playlist generally consists of only songs from a specific genre, with a few tracks included from closely related songs. For example, a station who has chosen to specialize in the pop genre may have a few borderline songs from country musicians in their playlist due to the pop-style sound of the tracks.
A radio disc jockey will need to be able to communicate well over the air, conduct interviews with musicians in a professional, yet fun, manner, and also be able to handle calls from listeners with professionalism.
A disc jockey in a dance club, rave, or other party-style venue will need to have strong skills for reading their audience. This enables them to keep the audience dancing all night without wearing them out or boring them. They will also need to be able to communicate well with the venue owners and managers, making sure that there are no conflicts with the songs they are playing, the type of audience their playlist is drawing, etc.
Overall, a DJ needs excellent communication skills and needs to be able to manage and organize a varied playlist and audience. A strong work ethic will help maintain employment with radio stations, dance clubs, mobile disc jockey companies, and private bookings. A disc jockey known for cancelling their appearances will not be hired as often as one who is diligent about their professional requirements.