Staying narrow on purpose
Version 1 should stay narrow.
The tradable universe should be cash equities and broad ETFs only. Do not open with options, leveraged ETFs, inverse ETFs, or illiquid tail names. Those create complexity faster than they create value.
Do not require journals, research writeups, or thesis notes in version 1. That will create friction and resentment. The competition should infer what it can from trading behavior first.