To start setting up your Trezor device, visit trezor.io/start. Begin by selecting your Trezor model and downloading the Trezor Bridge software for your computer. Next, install the Trezor Bridge and connect your device using the provided USB cable. Follow the on-screen prompts to initialize your Trezor, set up a secure PIN, and back up your recovery seed. It's crucial to write down your recovery seed and store it safely offline. Once your Trezor is set up, you can install the Trezor Suite app on your computer or use it directly via the web interface. The Trezor Suite app provides a user-friendly interface to manage your cryptocurrency assets, view transaction history, and manage device settings. Ensure you keep your Trezor firmware and software up to date to maintain security and access to new features. For detailed step-by-step instructions tailored to your Trezor model, visit trezor.io/start and follow the specific guides provided for your device.