Finally launched this weekend and got our first 500 users! Seeking growth advice

Hey folks! Earlier this week, a buddy and I launched our very first app. We’ve been working on it for a couple weeks — so not a crazy amount of time. The philosophy we've followed was to just build & launch something quickly to get early feedback from users.

Its a very simple idea - a tool for tech professionals to build a beautiful personal website in under 30 seconds. You can find it here at https://aspire.app.

Nothing crazy here, just something simple for us to just quickly get started on something that we could continue to build upon.

I’m wondering if anyone here has any tips on how to quickly get more active users (not just signups since that's just a vanity metric) & get existing users more invested in your product? We realize early feedback is crucial so we want to make sure that we're talking to users as much as possible while also leaving ample time for building product.

But at the same time, we want to be cognizant that spending too much time marketing while not focusing on keeping existing users engaged & active can hurt us long term. So wondering what the right balance is here as well.

Also if anyone has any advice on Reddit & FB ads that would be great! I've heard you need a pretty healthy budget for FB, but I've seen people have success on Reddit with smaller budgets.

I've also thought about setting up email campagins to target existing users. I've heard different ideologies on how frequently to send these emails though. We're thinking of sending emails every time we release a feature (which will probably be ~2-3 times a week). But not sure if this is too frequent.

Thanks!