I've been an Amiga user for so many years. I bought the faithful copy of AmigaWorld #1, it seems like yesterday. I've done about all I can do. Even became an Amiga Video Toaster developer using GUI/FX building tools. Now I'm ready for my final AmigaOS/MorphOS frontier. I don't know why I did not do it sooner. I want to learn MorphOS programming in C. I'm ready for the long learning journey and have some great ideas. Where should I start my quest? Books, websites? Anyone have some suggestions please? How long will this journey take?

C is pretty universal.
You can get books on it.
Go to the library (here) and you'll have the initial information to get the SDK installed and a great MUI tutorial by Grzegorz Kraszewski.

imo, the most important is to study all the shared libraries... if You will try to quickly go through them, this will teach You a lot about AmigaOS/MorphOS programming. On www.aminet.net are lots of programming examples with comments... I have never learn't anything about programming from books, imo the best learning method is to read example source codes... so the rkrm (rom kernel manual) examples at first... Good luck! iy You have any questions, feel free to contact me personally.

Read the ANSI C book from Kernighan & Ritchie and the RKRMs (e.g. on the latest AmigaOS developer cd) to get a basic overview of Amiga programming.
Then you can look at example source codes and understand them.