Ask HN: Developers–How Did You Get Your First Paying Customers?

I have just launched a SAAS.

But I am not on any social Media, neither I like Social Media, How do I promote it, I am Totaly stuck now, I spent 1.5 years building it.

Now I came to know that distribution is the main thing , and i am really bad at it as introvert, dont know how to market it.

Any Idea how I can distribute it, It is bootstrapped so no marketing budget as well, kind of stuck to be honest , no idea on how to scale it.

Can you share your stories how you scaled you SAAS to first 100 customers.