Your Kwikset 888 is a Z-Wave Plus lock, but is battery powered so will not repeat/extend your Z-Wave network. You can connect it to hubitat and lock/unlock, etc., w/the hub and automations.
You said "Smart Ceiling fan" - which brand/model did you get?
All of your other devices are wi-fi based, and the Hubitat hub will not connect to them directly - it requires Z-Wave or Zigbee devices, or an API/integration to talk to some Wi-Fi devices can be created in some instances.
There is a Ring integration for Hubitat but it is a bit limited, and a bit tedious to set up (same issue on other hubs due to Ring not opening up their ecosystem).
I don't use Alexa/Echo, etc., so not up to date on what there is for that, but you can read more about an Echo integration here:
