This project is just the first step in learning Tor. If you want to route more traffic with BBB, you can switch from a bridge to a public relay. Relays receive more traffic but are also more public. Your IP address will be listed as a public bridge, and some websites will refuse to serve you content even if you are running a nonexit relay.

You can also run a Tor hidden service on the BeagleBone. Using Tor with a client helps to anonymize your IP address to a server, but a Tor hidden service hides the server's IP address from a client. It would be an interesting project for a BeagleBone if you had a service that you want accessible only through Tor.

Hardware-wise, consider placing the BeagleBone and front panel in a dedicated enclosure. See whether there is a local hackerspace around you, and they may be able to help you make a nice laser-cut enclosure! If you don't have a laser cutter, you can use a SparkFun Electronics box like the one in the following screenshot: