Unfortunately, with smart home stuff, you need to choose between ease of use and control. Google provides ease of use because their stuff all works together out of the box, but there’s also a whole ecosystem of stuff that works together that takes a bit more effort to connect.

The barrier to actually controlling your smart home isn’t super high, but there are some things you need to learn about to pick devices. Another user mentioned a few things to research, but I’ll point you another direction that’s a bit like throwing you in the deep end.

HomeAssistant is a self-hostable hub for various smart things. Basically, you’ll install it on your computer and figure out which of your current devices work with it. Your setup will only be available at home until you get a way to access it from outside your home, but don’t worry about that to start, there are services you can use to simplify that later (or ask on !selfhosted@lemmy.world). Once it’s setup, you need to decide what things you can’t connect that you’d like to replace and look at your options (most likely you’ll pick ZigBee or ZWave devices, maybe Matter). HomeAssistant’s website has a bunch of documentation about various devices, like which will work, so you can use that to help shop too.

If you can manage that, you’ll get a lot more control over your smart home and eliminate whatever monthly fee you pay. Some devices won’t be available, but the ones you pick will continue to work as long as the hardware isn’t broken (even if the manufacturer discontinues support).