Ask HN: How do you know if you're good enough to work on an ambitious project?

Recently, I've been wanting to write some sort of high level programming language for biology, and this is no easy task. The rules are not clear and I don't have a PhD in synthetic biology.

I know this sort of thing will be hugely impactful, and I want to work on it. But I honestly don't know if my work will even be remotely meaningful.

Do I work on this, or just focus on something more tractable, like SaaS projects