You are down, but not necessarily out. Every school, clinical site, and board of nursing are different, though. In general, they'll look at:
1. your age when the crime was committed
2. how long ago the crime was committed
3. how serious the crime was
4. and how much of an isolated incident the crime was
You're good where those issues are concerned.
Your worst outcome would probably be a restricted license, but even that's unlikely, IMO ...which is a good thing, because it would be horribly expensive and make you virtually unemployable.
Most boards of nursing will not offer you much assistance or advice until you've actually graduated from a nursing program and are otherwise qualified to take boards. The state of Texas is the one exception I'm aware of. They will approve or deny you in advance.