This is a list of some tutorials to help you learn how to do specific things in Danmakufu or improve your general skills.
Danmakufu Basics Tutorial by Blargel
Basic Bullet Patterns (Tutorial) by MCXD (Under Construction)
Danmakufu Intermediate Tutorial by Naut and Iryan
Wonderful☆Life's Introduction to Menus by ChaoStar
Sparen's Danmakufu Tutorials (A variety of different topics, only covers basics and some techniques)
- Also contains a detailed Error Message compilation, although dated since ph3 now supports error messages in English. Most pages will link you to my ph3 tutorials site here