All I can get to is a few zones in the first chapter. Is that it right now?
What version of the game are you playing? The newest patch (0.5.4) includes chapter 1, which has 7 combat zones and some side zones, as well as the first 4 zones of chapter 2.
If you have the Alpha installed (version 0.5 or higher), just run the Launcher.exe you used to download the game and the update will download. If you need to install the Alpha, download the launcher from https://lastepochgame.com/my-account
Let me know if there’s anything else I can help with!