Default [Q] Droid Ultra update questions

Okay, so I am on 4.2.2, rooted using the RockMyMoto method. I have not yet seen an OTA, but I see zips galore and confusing banter in the threads about the .zips. What I am wondering is what would my course of action be to upgrade to 4.4 and keep my WiFi tether?

Not an ADB, Fastboot, or RSD noob, just being super cautious so I don't rush things and get bricked.