Check out Home Assistant. Not sure how well voice controls work with it but my automation is flawless so far. Really seems to help using local only open source

Check out Home Assistant. Not sure how well voice controls work with it but my automation is flawless so far. Really seems to help using local only open source firmware where I can and Zigbee for any sensors that aren't hard wired in (mostly for battery efficiency.) I just read yesterday that Home Assistant is now automatically included in Raspian (Raspberry Pi targeted OS). I run my home and shop automation on Pi's but ultimately a NUC is probably a better long term solution.