I've not posted in a while, but I thought I'd share my thoughts about my own home IOT journey. After a bit of thought at the beginning (about a year ago), I decided to concentrate on getting the lighting in my house done first, before thinking about anything else.
First thing I did was create a seperate VLAN for all the IOT devices home network, like a lot of home networks mine lies in the 192.168.1.0/24 range.
New VLAN for IOT
SSID "HomeWifi_IOT" (VLAN Tag 40) ip range 172.16.69.0/24
At the start, I spent a fair bit of time trying to find a decent Zigbee non-neutral switch, unfortunately none of them passed the wife test, invariably they were white plastic and a bit rubbish. After a bit of thought, I decided to go with the Shelly 1L and a nice brushed metal (old school) switch which seems to be the preferred option of the family.
Next year, LED strip lights (more) and Zigbee smart bulbs connected to some of the Shelly smart switches (in detached mode), something I'll need do some research about. Getting there slowly.
Take care and have a good Christmas.