Good thing is, you can go in stages. I started out many years ago with wifi bulbs/plugs through Google, then Alexa (because echo dots went on sale super cheap once). Then I got a Hubitat and started moving things over to Zigbee/Z-wave/local Wifi, i.e. light bulbs got switched over when they burned out, new switches and plugs are local-only, etc. then upgraded my homeassistant to a raspberry pi. I still have Alexa speakers, but Nabu Casa is developing a smart speaker that can be configured to run fully local, so I’ll probably be getting a few of those soon-ish and cut out one more bit of Big Brother at least.