The main way to progress through Zenless Zone Zero is to complete quests to progress. This mainly means navigating through all of the chapters in ZZZ and the many missions they contain.
[ZZZ] ALL FUTURE CHARACTERS in Zenless Zone Zero (Official Sources)
There are all sorts of commissions available to complete, with more to come in future updates. There’s a lot of content to navigate, which can make it tricky to figure out what to do next, so here are all the chapters in ZZZ to help you work through them.
There are currently three or four chapters in ZZZ, depending on whether you count the prologue. However, the number of chapters will continue to expand in future updates.
The first chapter is called Chapter Zero, meaning the chapters technically start with Chapter One. But this prologue chapter still has a solid amount of content to navigate through.