Shelley Mainnet launch date and registering pool

Sorry if this is a stupid question, but seeing as the Shelley mainnet is already running - is it possible to register a pool already? What does the 29th July date signify? Is it the date that staking becomes possible or is pool registration also restricted before that date too?

That is yet another testnet, nothing to do with mainnet. Those who registered to this will have to do it again like you at mainnet.

so the config here that says ‘mainnet’ is not the mainnet?

https://hydra.iohk.io/build/3246637/download/1/index.html