Head lights tail lights won’t turn on

2008sprinterboy

I think this may be the problem. During my frustrations I put the battery in backwards and put the terminal cables on the wrong terminals and tried to start my 2008 sprinter. I feel like it’s a fuse or relay, but I don’t see any blown fuses. My headlights and taillights both do not turn on as well as running lights. The battery light is also on on the dash. Any ideas?