If you need networking, go for the ESP32. There’s nothing easier or close that I know of, and incredibly cheap too. Downside is the power draw. If that is a concern and you really do want to run it off a coin cell for any prolonged time I’d say WiFi is out the window altogether, and I’d pick something efficient but more modern than an attiny, like any small arm cortex m0+ devboard or similar. If you want to experiment with low power radio, see what you can come up with with some lora transceivers.