update

So I bought an iPod touch years ago and I never did use it. Now I’m finally trying to sync it to my computer, so I can put my music on it. But when I try to connect it to my computer it says I need to update the iPod to connect. So I looked up how to update it without a computer and it said I can update through my wifi. So I connected to my wifi and went to the update and it won’t let me press the update button. Any ideas would be appreciated. Thanks. iPod is a