1. Download the App: Go to the Google Play Store and download the Proton VPN app.

2. Enable VPN: In the app's Settings, enable the VPN option and choose a server (open or local).

3. Configure Server: Log in to the server (e.g., 127...1) and set up the VPN session.

4. Start Using VPN: Open the app, select the browser extension, and start using it to access the internet.

5. Test Security: Check if your browser is blocked by Proton VPN. Try accessing popular sites like Google, Facebook, and Stack Overflow to verify.

6. Turn Off VPN: When not using the app, unblock your browser to stop additional VPN usage.

7. Server Settings: Review server settings if needed, to handle any issues with the server response or IP blocking.

8. Browser Choice: Use a modern browser like Chrome or Firefox for optimal performance.

9. tunneled Size: Consider Proton's tunnel size; it may be better suited for your needs than alternatives.

10. Additional Features: Explore Proton's features like unlimited storage and firewall settings if relevant.

11. Performance: Be aware of potential performance impacts; use a modern browser to minimize issues.

12. Troubleshooting: If issues arise, check server logs and server response times for troubleshooting.

By following these steps, you should be able to set up and use Proton VPN effectively on your Android device.