In your opinion, what's the best beginners tool to help teams with autonomous?

[MAXOFLIFE]

Currently, our team has little to no experience with a smart autonomous system and would like to improve our situation. We have the FRC Gyro & Accel Board, a USB camera, a raspberry pi, an ultrasonic sensor, and two of the encoder kits from FIRSTchoice. Our experience consists of basic LabVIEW knowledge and a possible outlet for help with C++, but no experience using any of the above options.

While we would obviously love to incorporate a little bit of everything into our design, we want to choose one and do it well. Our goal for autonomous is to be able to place a gear on any of the three airship locations.

Out of what I listed (or anything else you believe to be helpful that's under $100), what do you think is the most effective tool to help make a working autonomous when considering we have 3 weeks to create a system from scratch?

Thanks for the help!