My first app ever is in Beta — now what?

Achieve Arcade is the first app I've ever built, and I've enjoyed developing it from scratch over the past three weeks.

However, now that I have launched the beta version, I'm not sure where to go from here.

I don't have a substantial audience or online presence, so it is challenging to find people to test it out.
I've been mainly relying on Reddit, and it has brought in some opt-ins from my landing page, but only a few have downloaded the app.

On the landing page, I have outlined a roadmap for future, more advanced features, but this beta version is primarily a validation for me, and I'm considering dropping the project altogether if no positive feedback comes out of this.

The plan is to leave one or two weeks to gather feedback, determine if people like or actually use it, and then officially launch it for a one-time $0.99 purchase.

I guess I've hit the launch roadblock.
Not sure how else to promote the app, if building new features at all and in general what to do next.