A buyer you can actually reach
If you cannot name where they are and how to talk to them, the idea is still fog.
STARTING OR REBUILDING
Start smaller. One buyer you can reach. One problem they already want fixed. One offer they understand. One path to the first sale.

BEFORE YOU BUILD
Talk to the customer. Use their words. Sell a simple promise. Keep notes on what repeats. That is enough to start.
If you cannot name where they are and how to talk to them, the idea is still fog.
Do not make them care from scratch. Find the thing they already want off their plate.
Sell the smallest honest promise. Then write down what made the yes happen.