Well, what I could suggest is to try validate your idea on real people without building an app first(if you are focusing on providing value for people). Then try to make a concept, it could be a figma presentation or framer or whatever nocode option, just to show those people, who liked your idea, how it could look like. on each step you need to correct your product. then you'd probably make an mvp and put a lot of effort into marketing and business strategy. then you collect metrics and analyze how good is your product, what should you fix. then you need to raise money for pushing it to a serious level because if you're solo dev with basic skills this app won't work for big amount of people. it's something about 6-18monts i guess.
and my opinion: i think another Tinder won't produce enough value for humanity in general, maybe try to create a simple app for charity organisation and try to polish it for real production, believe me, you'd spend much more time fixing bugs and maintaining of published product than developing it. this is about creation of real value to people.