If you want to already explore the network while sitting on the waitlist, here is a small trick: The SPXP bridge is already handling the AT protocol! You can use it to explore the network via SPXP, for example Jack's account: https://bridge.spxp.org/at/@jack.bsky.social
You can either hop through the json data in a web browser (Firefox works best) or use a mobile client like the https://heyfolks.app. It even suggests a couple of Bluesky accounts to follow on initial setup.
If you want to learn more about the SPXP protocol: https://github.com/spxp/spxp-specs/tree/master#social-profile-exchange-protocol