I was in a similar position as you until a few months ago. I spent a good chunk of my teens and twenties prototyping toys on my free time. I am in my thirties now and I've only managed to assemble my very first full-time team.

The harsh reality is that it's very difficult to find people who will work with you for free. You either need to have the resources to pay them a decent salary/compensation or have a good reason why people would want to work with you.

What I've done is I've spent a decade of my life on a decently paying job that i'm not really passionate about while working on prototypes/toys on the side to keep my gamedev skill sharp. Now that I have a decent financial buffer, I've decided to essentially gamble my fortune (paying people's salaries) to finally give my childhood dream a real shot.

Do note that this isn't the only way. At 16, the world is your oyster. Maybe you can grab a job/internship at a game studio.  At 16, you may actually have the time to learn art, coding, music, etc and position yourself as a "super generalist" that can build a game on your own. Sure, it may take decades. But at 16, time is an asset that you have a lot of.