I found success on my first project, luck or skill?

I recently launched my firs project rotateproduct.com which helps e-commerce users create video ads from a static image using AI. I had experience with business directly before I know a bit about how physical product marketing works but I never launched an online app, I finished my Computer engineering bachelor and since I had no plan I decided to launch an app, I didn't expect much since most indie developers say that you need to iterate.

I just dove in this world and launched an app that I myself used in my other business, so I thought if I am ready to pay for this then probably there is more people like me. I didn't know how SaaS marketing worked but I just started researching, one thing I knew for sure in my small local business is that nothing beats paid advertising so I did just that with my app.

In the end I think the advertising knowledge from my small business and the idea that "what I would pay for other people would also pay for" were 2 main things that made me have success in my first launch.

Just to be clear what I call "success", in two weeks I have 30+ signups and already a paying customer when I didn't expect even 1 signup, I don't have a big following in any social media, so it's not earth shattering but for me it's success.