Bitcoin is not entirely new.
It is a new recipe that combines previously invented technologies.
Bitcoin was created in 2008 by Satoshi Nakamoto. People still don't who he or she is or if it was a single person or a team.
Bitcoin network is a group of computers, which all have a copy of the database, the blockchain. Their copies are continuously being updated.
If you are still not sure what it is, read this article:
https://finrazor.com/news/back-to-basics-what-is-bitcoin.