I can’t start executing this design because the account currently has no available ACUs, so AI project actions are unavailable.

Nothing has been added to the project yet; it is still an empty new project with no components or nets. Once ACUs are available, the remaining work is to create the full USB-C powered Wi-Fi/BLE temperature/humidity sensor node: select the MCU/module and digital T/RH sensor, design the protected 5 V input and low-power regulation, add USB-C default-current handling, OVP/UVLO/OCP/reverse protection, build the schematic, verify power budget/ERC, and then proceed to PCB placement/routing with RF antenna keepout considerations.