Streaming remotely

[whodatguy]

I'm tired of countless issues with Plex. I'm doing a trial of Infuse media player and using this guide:

https://support.firecore.com/hc/en-us/articles/115000074153-Streaming-Away-From-Home

I setup WebDAV on my TrueNAS and registered a host on no-ip. Please assist as it recommends using airport utility and I found 5.6.1.2.

Thanks