ESP32-C5 connect to wifi

This is my first attempt at using an ESP32 device, and I am having trouble. I cannot connect a new EPS32-C5 to wifi. I have flashed the device with espectre-2.6.0-esp32c5-ota.bin. Options for adding wifi network:

1. BLE - Using ESPHome ##Builder/ in Home Assistant (desktop) how can I add the wifi network details without overwriting the entire thing?
2. USB - device is connect to the laptop. Using https://web.esphome.io/, I get the error message "An error occurred. Improv Wi-Fi Serial not detected"
3. Captive Portal - the page http://192.168.4.1 gives an error message: "This site can't be reached"

If i use the file "[espectre-c5.yaml]" (https://raw.githubusercontent.com/francescopace/espectre/main/examples/espectre-c5.yaml) in ESPHome Builder i can see the device in Settings - Devices, but it only has one entity (disabled).

What am I doing wrong?