A Night Of Firsts

First time shooting football. First time shooting with glass greater than 200mm. First time shooting on a Nikon. I shot football on Friday night to get some experience with it. This is what I came out with, but I did learn a bunch of stuff and want to keep shooting this sport. Though I couldn't follow the action or focus worth a damn, I had a ton of fun. Any tips or criticisms would be greatly appreciated.