Redraw the echo hello-world board, add (at least) a button and LED (with current-limiting resistor), check the design rules, make it (if you have time this week, test it).
optional: simulate its operation. Measure its operation
Select and use software for circuit board design
Demonstrate workflows used in circuit board design
Shown your process using words/images/screenshots
Explained problems and how you fixed them, including how you worked with design rules for milling (DRC in EagleCad and KiCad)
Included original design files (Eagle, KiCad, Inkscape, .cad - whatever)
NB. Also, if you make a board and it doesn't work; franken-hack that board (with jumper wires etc) until it does work, then make a new one with the knowledge you have gained.
Can I modify an existing design board?
Answer: 1. Yes as long as you acknowledge the original design and explain your contribution to the board.
Do I need to create a schematic file?
Answer: 1. If your software does not generate it no, otherwise yes. You can draw or use kokopelli which does not create schematic files.