Hi Mike - if your trainer is a new Tacx Bushido Smart (T2780) then Zwift will automatically control it’s resistance. All you need to do is search for it under “Controllable Trainer”. This will also set it as the “Power Source” or you can pair a power meter if you have one.
Once you’re logged in, you should see riders from around the world in the riders list on the righthand side of your screen. If you find yourself alone, it means that your internet connection has dropped.
Make sure when you’ve set it up that you pair “Power Source” “Cadence” and “Controllable Trainer”, and Heart Rate if you have one. Make sure you do NOT pair speed sensor.