Hi, is there any doc/guide for upgrading from version 1 to version 3? I see the guide for version 2 to 3 and wonder if there’s something similar.
Thanks!
Welcome to the forum! 
In the old Kirby 2 docs there is an upgrade guide from v1 to v2. It would probably be best to first upgrade to v2 and ensure that the site is still working. After that you can upgrade to v3.