You shouldn’t be confident, as based on your post you don’t have a lot to offer. Yet.

Most actual business owners started out after years of doing something for someone else, then realizing that we can do it ourselves.

Then we make the leap, and we get kicked in the soft spot for several years, wondering if we made the right decision.

Eventually a few of us make it to a point where we can say that we’ve won. We work for ourselves, and we can sell the business if we want.

Your main advantage is that you have nothing to lose, as I’m assuming you don’t have kids. Stay out of debt, work hard, sacrifice living the high life for a while, and you’ll give yourself a chance.