Since you posted here on this forum platform and want to promote the exchange you mentioned here, I think it would be better for you to handle it with experienced managers
here on the forum platform like @Logitech Mouse, @icopress, @AB de Royse777, @yahoo62278, and @julerz12.
Because whoever of the managers I mentioned will definitely help you promote the exchange you're talking about here, maybe you have an allocation budget for promotion, right?
The right budget and timing (for how long it would go) is all there is for the campaign, basically (besides a good manager).
And other activities maybe on the forum to keep the thread of the platform fresh.