Also recommend Home Assistant. Their integration page is a great resource when looking to buy products as they'll tell you exactly how your device will connect to it, whether it's local control, cloud control, etc.
Seems the main focus there is on hosting Lemmy instances. I subbed hoping to see stuff about hosting your own domain, media server, storage server, etc but didn't see any posts that weren't about Lemmy.
Be the change you want to see? Lemmy is still a baby and someone's going to have to make those posts or ask those questions if that content is going to show up there.
You can't self-host Amazon's shopping, and sometimes they're the only ones who carry certain items since they've fucked local retailers for the last 20 years.
But regardless, people should be allowed to use cloud services without fear of being banned whole-hog for pissing off some suit in Seattle.