Most people agree that the purpose of the news media - newspapers, magazines, radio and television - is to inform, to educate and to entertain. However, the purpose of the news itself is to inform and to educate your readers, listeners or viewers.
The entertainment can come from other areas - music and drama programs on radio; cartoons and crossword puzzles in newspapers. It is not the job of news to entertain.
This does not mean that news should be dull. If a news event has an element of humour, you should always try to write the story in a way to amuse your readers or listeners.
Nevertheless, the news should only be reported if it is real news. Do not report non-news as if it was news only because the story is entertaining.
As you gain more experience, you may be able to write things which are purely entertaining - such as a humorous look at current events. This is not news, however, and should not be presented as if it was.
Make it clear to your readers or listeners what is news and what is not.