How do I get my first 100000 users on my saas. (dont worry I will not promote)

So I'm planning to start a Fin-tech app, with financial database and equity reports about all the listed companies in my country. It will have other features as well of course. There are 2 things tho- I am 14 I have a budget constraint of $5k How can I make the saas, support it on the servers and market it within this budget. I was planning to vibe code the app, but I dont know how to attract consumers. If anyone has any advice for me, I will really appreciate it. submitted by /u/Interesting_Ease3093 [link]