Don't look in the OBS knowledge base how to use OBS with social media websites. There are so many websites, some OBS kb cannot describe them all and keep the documentation current. Instead, look in the social media knowledge bases how to stream to them. OBS is usually mentioned.
Streaming to your own website works usually by streaming or uploading video to some streaming or video on demand service such as Youtube, then embed the Youtube player into your website. This way you don't need to build your own streaming or video on demand service, which is quite a huge undertaking. How to embed their player into your website can be found in the knowledge base of that service.