You will develop the schematics (Gerber Files, BOM, and the Eagle Files) for a PCB for a component device. It is a singular function device with one chip.
The main board, which it will need to fit into, and other reference component devices are all open hardware + open software. I will provide links to all of those files. You can use those existing diagrams and specifications to model this piece.
The chip you are designing for has complete documentation as well, which I will provide.
So, you will take existing schematics for existing PCB components as a starting guide, look at the specifications for the chip ( I will provide all the documentation), and you will design the component piece that includes that chip, and deliver the schematics files.
If you have experience designing printed circuit boards (PCBs) this should not take you long.