Although we tested everything a hundred times and created Zero One to be straightforward as possibly can, we know that issues are possible, if you accidentally delete something or similar.
Make sure your server meets the Kirby requirements https://www.one.thezero.club/guide/installation#requirements. Especially check if URL rewriting is turned on.
If you get in some trouble with theme setup, don't hesitate to contact us on firstname.lastname@example.org
Free theme support covers bug fixes and help with theme settings. We can also help you with some minor modifications and guide you to right direction how to do it yourself. If you’d like to add new features or change how the theme works, that would fall outside the scope of regular theme support.
Official Kirby Guide: https://getkirby.com/docs/guide
Kirby Cookbook with examples and tutorials: https://getkirby.com/docs/cookbook
Kirby Casts - video tutorials: https://www.youtube.com/kirbycasts
Kirby Reference - everything is there: https://getkirby.com/docs/reference
And of course, the fantastic Kirby community: https://forum.getkirby.com/
Check out also Kirby Plugins, there are many fantastic plugins that can save you development time. But, keep in mind, those are mostly free plugins, consider donating the author if his/her plugin helps you.