Otaku dance is a dance related to otaku culture such as animation, anime, and games, as well as dances that use otaku culture-related tracks in the BGM; it also includes dances originating in the trial area of NicoNico animation, as well as other dances that use NicoNico animation-originating tracks;
Otaku dance is a relatively short period of time, and it has not yet formed an independent and complete system. norms are not standardized and span a wide range of difficulty.
The simple otaku dance is on the same level as radio gymnastics or square dance, so you don't need any foundation if you start from the simple one;
But the more difficult otaku dance needs some dance foundation, such as some basic dance movements, body coordination, softness, sense of rhythm, explosive power, etc. If you have some foundation of other dances, it will still be very helpful for you to learn otaku dance.
These are the basics of dance.