I don’t know enough to know if my ideas are achievable, or if I’d just be bashing my head against the wall.

Achievable is subjective, and even if you progress a ways and learn something that makes you realize that that particular project can't be achieved how you envisioned it, you still have the knowledge to either a) figure out new ways to achieve the same effect, or b) take to a new project.

Knowledge builds on knowledge builds on knowledge. If factor in not starting a project is not knowing enough to know if it's achievable or not, you'll never actually get the necessary knowledge to figure that out. You can't know how to do something until you try to do it...fundamentally.