There currently isn't a startup idea I have. There's some random ideas I've thought about pursuing, but I'm still waiting for something that really inspires me

There currently isn't a startup idea I have. There's some random ideas I've thought about pursuing, but I'm still waiting for something that really inspires me to dive in. I have one small side project with ~11,000 users, but it's entirely free and monetization of it is quite tricky. It's a donation model now, which many would say has failed. $23 in three years. So I'm still looking for an idea I love. I figured in the meantime it makes sense to orient myself in a startup. That way I can figure out the way things truly are and convince myself that building one myself is a possibility for me. Thanks for your response.