Huh? Yea it is rather easy to set up a server for bluesky, did you read the docs?

That said they’re not quite the same - clients don’t connect to multiple servers like they do in nostr (saving a ton of bandwidth in exchange for the server they’re using being able to censor), and the default server just serves your content, it doesn’t index other servers’ contents so you can use that to build your own feed (like nostr in that regard but more important in bluesky).