The source is anything that provides distinctive characters and costumes, including American comics, computer games, science fiction/fantasy novels, movies and TV shows, animated shorts, dramas, and novels. Generally speaking, Cosplay does not fully show the accuracy of history and games. In general, Cosplay in Australia often appears in places with many people, such as capitals and urban centers. Because these huge populations support the diversity of marginal cultures. Although it is very common for good cosplayers to perform in large-scale events throughout Australia, the cosplay display is not limited to large-scale events because of this. In addition to some large-scale performances, small groups in many places also hold their own cosplay events.
https://www.ccosplay.com/
I like cosplay. Some people think it is childish. It is just a game played by children. I don't object to this statement, but neither do I. There are more than 20 and 30 people in cosplay circles. Cosplay is not a child's thing, perhaps because it is close to animation, people have misunderstanding.

However, in Japan, one of the three films in the cinema will be an animated cartoon, among which there are many works that we are familiar with, such as Detective Conan, Crayon Shinchan, Slam Dunk Master, etc., and those who watch animated films can say that they are from 0 to 99 years old responsibly. As long as you think about it carefully, cosplay is a drama or musical.
The reason why I love cosplay is that I can find new friends and hobbies here.