Installed zwavejs2mqtt..What Now?

I just installed zwavejs2mqtt using snap. I don’t know what to do next. I tried http://:8091/ but it timed out. I have been searching this site and others. Everything I have found seems far too complex for something that is just installed.
I tried some of the “fixes” but nothing I do gets the responses that the “fix” calls for. Where do I start?