Ok good. The device is in the DB, but you need to update the binding since it was added after the last stable release OH3.3. Look at the end of this thread for 2 ways to update the zwave binding. Do whatever you feel comfortable with.
You don’t need a powered hub, that is optional. I like the powered one because I believe it provides a more even power to the antenna. (If the pi gets busy there could be a dip on the USB). I could be wrong as I am not an expert.