someone should write a tutorial on how to do this. I was poking around earlier but gave up after a few mins to focus on other work
they kind of buried it: https://zora.energy/testnet you can send Goerli ETH to this contract: https://goerli.etherscan.io/address/0x7cc09ac2452d6555d5e0c213ab9e2d44efbfc956
update - there are now 3k bridge transactions of which at least 1k came from https://bridgetozora.world (which was only created because of your cast) 🤝