Homebridge and home assistant

I would like to find out more information about connecting home assistant with homebridge with the ability to use home assistant with siri. I have home assistant installed perfectly and all working fine. Would i be able to add home bridge as a plugin with home assistant already installed, if so then how would i do that as i have found that people have home assistant as a plugin with homebridge being installed first? If you have home assistant working with siri can you tell me how you did it and how easy was it to install?
thanks for future reply’s

Did you check out these sites?