I bought my HA green before I started buying smart home peripherals - I've only plugged in some esp temperature and humidity sensors so far.
I'm looking to smarten my lighting. I believe that smarting the light switches is more sensible than the bulbs.
I'm in the UK, if it makes a difference.
If you were buying kit for the first time, what would you buy? Rather than "what can I force to work with HA?"