oh, the sweet sound of crickets. love that for you. welcome to the club.
forget SEO and directories-those are for people who have time to wait six months. you want warm bodies in the first 48 hours? get your arse into the niche trenches. find the specific Discords, the tight-knit forums, the Slack groups where your people are already complaining about the exact problem you solve. don't drop a link and ghost. offer to help, run a personalised demo, make it feel like a favour not a sales pitch.
also, call in every favour from your network. even if it feels like you're begging your mate's mum to sign up, do it. That first handful of users is fuel for word-of-mouth-or at least gives you something to point at when you pitch investors