I just installed MMM-AlexaControl with success (with Echo 5)
It was really easy.
Followed the instructions from the first page on git and put the basic configuration in config.js…
Then went to alexa.amazon.com in order to scan for new devices, it found directly the devicename I put in the basic config.
My aim was to jump to a specific slide on MMM-Carousel by talking to Alexa.
This slide is the first one and containing an MMM-CalendarExt2.

Here is the configuration I used if it can help someone :

{
    module: 'MMM-AlexaControl',
    position: 'middle_center',
    config:{
      deviceName: "Miroir",
      image: false,
      pm2ProcessName: "mm",
      monitorToggle: false,
      vcgencmd: true,
      notifications: [
         {
           name: 'Menu',
           port: 11100,
           OnOff: false,
           notification: ["CAROUSEL_GOTO", 1]
         }
      ]
      }
},

Now, I can just say to Alexa (in french sorry…)

Alexa allume miroir menu

and it jumps to the correct slide rather than having to wait the cycle between all slides of the carousel.