Do you own any $TAO tokens and do you hold them on the native Bittensor wallet?  

You have to first own $TAO tokens and stake them to a validator on the “root” subnet.  This is easy to do.  

Once you have done that you can shift your stake from the root subnet to any other subnet.  

It all seems very daunting at first but once you do it you get the hang of it very quickly.