This is the most exhaustive written guide you will find. Includes beginner, safe, and advanced techniques as well as frame savers. If you want to know something about the game, it is in this doc.

https://docs.google.com/document/d/1Oy28UONnU--EB-JPQfbLE-rtIkkqEhfWhHEN14wE17g/

Note: Currently completed up to Agahnim.