Go to Community > Contest > National TV contest (it's at the top of the list of all the contests running here currently)
Click on that - just click on the middle somewhere, you can't go wrong, I think
You should see "submit your photos" Click
Since you only have one photo uploaded, you should see it. Under it you will see the option to submit. Click on it.
Bingo, you're in.
Now . . . you only have until Saturday to ENTER, but you have until the end of February to solicit votes. Good luck.
And I did this from memory, not looking, so if any step doesn't work, look around or come back here.