gofundme
> an app that would enable people to raise funds by offering services to their community
Taskrabbit?
> creators can begin receiving orders from their supporters, discuss details, create customized offers, and more. On an agreed-upon date, creators would complete their tasks, the supporter would confirm that the task has been completed, and creators would get paid
Kickstarter, except kickstarter fronts the money which is often necessary for completion.
You have built a two-sided market. This is very difficult, because you need to recruit both sides of the market. And you need to convince them that you can handle money.
> I'm an introvert. I have a small group of friends, I work remotely, and I don't use social media like Facebook, Instagram, Twitter or LinkedIn.
Unless you get a co-founder who does, or some sort of marketing lead, your chances of success are zero. Your best hope is to find some sort of community which needs this service and persuade them you can help. I think Kickstarter got started with comics and board games: raising money for printing costs. You will also need to decide what you want to do when the "community" who want to exchange money for "services" is sex workers.
Work out your route to market before writing any code, if you want to make any money.