I read the textbook, everything is available, but there are questions!
How do I know when a vote will be initiated for the arbitrators? Only periodically visiting the site with the projects? Now there is no work for the arbitrators?
You can check on the homepage the projects that have a claim open.
Right now, on testnet, you can check the page periodically or open a claim yourself if you want to test it.
Once the site is launched to mainnet, there will be notifications.