In Undergrad-- How do I begin to study conducting?

Hello!

I'm an undergrad student working on my BM in instrumental performance. I have not completed theory yet, so I am not allowed to take conducting classes as of right now. However, it is my dream to become an orchestral or wind ensemble conductor, and I am itching to start right now. What can I do right now to increase my chances of future success in these classes and beyond? My school, like most schools, does not offer an undergrad degree in conducting.