Some tips…
Your harmony hub comes with 60 days free support… Call them up and have them build your various apps series… (watch TV) , Netflix, Music, disney, Xbox, etc… By default they will build them to be exclusive (turning one one means turn the other off) maybe you want Music outside playing at the same time the tv is on. The tech support is outstanding and i spent hours with them setting up my gear.
I have my Harmony connected through ST and use echo to control my whole house sound system- “Alexa turn on/off the TV”, “Alexia turn on Apple TV”, “Alexia watch Netflix.” “Alexia play Pandora outside” “Alexia play Pandora inside” So as you setup your apps make them natural voice as much as possible.
Spend some time read through the thread posted by JD, it’ll help you setup using momentary virtual devices etc… every time i though i was smarter , it turns out he all ready thought it through… The Post was started with IFTTT and direct integration was added about midway through…