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by thisismyname 4946 days ago
Build a landing page slightly explaining it with an email sign up field/submit button (like via launchrock or some other co).

Invest $50-$75 or so into some keywords/ads via adwords and see if you get signups. Fastest/cheapest way to validate.

If that goes well, put a full plan together with a schedule attached and go at it.

Good luck!