To vote you should have had ID tokens in your wallet before the balance snapshot. It was made 2023-06-07T11:37:00Z
You can check it here: Snapshot
If you didn’t have any tokens before the snapshot, all you have to do is delegate your votes to one of the delegates, or wait for the next votes. You can delegate here: SPACE ID
The domain name search function is not working yet, so you need to use the wallet address search. For example, you can enter my address in the search field (0xAFe934d660C157b7622cAD704BCd910972ccA72B), and it should be shown me.