indiehackers.com is a good resource for this. Your goals are different from the startups here, in that you're not after investor funding, but instead want to e

indiehackers.com is a good resource for this. Your goals are different from the startups here, in that you're not after investor funding, but instead want to earn a side income. Therefore you won't need to quit your job and spend 100 hour weeks on your side projects, like you might have to with a startup. You can simply build it and grow slowly.