SmartThings or Hubitat are two popular off-the-shelf / all-in-one boxes. Home Assistant is also very popular, but you have to build your own hub to run it.
If you are planning to bind the Blues directly to Hue lights (via zigbee direct binding), just remember you’ll need to remove those Hues from the Hue bridge and instead pair them to the hub the Blues are on.
Smart switches are generally not ever rated to control outlets, and smart dimmers are definitely not.
A dimmer (smart or dumb) should never control an outlet, since an outlet should always have constant 100% line power. Even at full-on, dimmers do not typically pass 100% power.
You should instead just use a smart plug (wall-wart) for this kind of thing.
Have you updated the firmware on them? No idea if it’ll help, but may be worth a shot… https://hubconnecteddecorasmart.leviton.com/hc/en-us/articles/4407521680155-Can-Leviton-Z-Wave-Products-Firmware-Be-Updated-
Check to see if you have a neutral available in each box before ordering a bunch of switches based on other criteria.
Also, you said all lights are LEDs but are they all dimmable?
Hopefully you also ordered the SkyConnect dongle when you ordered the Green? The Green itself does not have any radios.
Your wiring is not correct. I don’t see a neutral in that box, so you can’t use that switch - it requires a neutral. You currently have the switch’s neutral & (what I presume to be) load hot pigtail connected to the load hot wire going upstream - that won’t work.