30 users joined my waitlist within a day and a few of them are ready to pay.

Yesterday, I created my landing page with the idea and use cases of my new AI app. Then, I shared it in the subreddits requesting for validating the idea. I got a few validations and more signups for the waitlist. so my question is should I start building now or need to wait for some more time? Waitlist URL - https://mmntm.me/infography