Quinn Jacobson is a good starting place as his book on the process is well done and easy to understand. He also does workshops.http://www.johncoffer.com/
John is an interesting character and if you want Collodian the way it 'used to be' visiting him and even the site is a good experience.http://www.collodion.org/
Scully and Osterman are very good. A trip through history while learning.
Best of luck and don't forget to put the cyanide in a completely different container than everthing else - especially the containers you use for drinks. We lost some photogs through the years as they woke up in the night and grabbed the bottle of cyanide instead of the bottle of beer...