The Inride 3 will work fine with Zwift, I have one on my KK dumb trainer (so is it smarter now?). To get the power close to accurate, you'll need to do the spin-down test, maybe more than once. The reported power isn't nearly as accurate as other trainers, but it does work. I picked up an Ant+ dongle and a USB extension cable so that the dongle is fairly close to the Inride. Install zwift, plug in the USB cable, start zwift, select the Inride and you're good to go.

Resist the urge to make it more complicated than that. Sure, you can buy a fancy smart trainer if you want, but it isn't necessary. After you've zwifted (is that a word?) for a while you'll know whether or not your fairly economical setup is sufficient for your needs.