Bitcoin is a complex topic. It took years of devopment after decades of groundwork. It can seem overwhelming at first for new users to get started. This section is to help you learn fundamentals about Bitcoin if you have no prior knowledge.
One great resource is the "official" Bitcoin website, Bitcoin.org. It isn't actually the official Bitcoin website, because Bitcoin isn't a company it is a decentralized software protocol, so no one is really in charge. But this is a great place to start researching. You can read the Whitepaper, find a list of wallets, and learn about accepting Bitcoin for your business: Visit Bitcoin.org
Jameson Lopp is a Bitcoin developer, he has compiled a fantastic list of resources for Bitcoin newbies. you can visit Jameson Lopp's list of resources for Bitcoin beginners here: Visit Lopp's Getting Started with Bitcoin page
Another wealth of information is The Nakamoto Institute's website, which has the Whitepaper, the Cypherpunk Manifesto, Satoshi's original emails from the Cypherpunk mailing list, and many great articles: Visit The Nakamoto Institute
Andreas Antonopoulos was one of the early promotional voices supporting Bitcoin. He was a software developer who became a full time Bitcoin educator after discovering it in 2010. If you absorb information better from video than from reading text, then visit his videos page for a collection of his YouTube videos. You can also click through to his channel and watch some of his earlier speeches if you need some motivation: Visit Andreas Antonopoulos' site