What about picking a light source, paper and process...and going for it? Make new negatives for the new process, rather than use old images processed for other processes. Print until one is happy with the prints, give oneself at least a year or two or three to reach this point, then print more. The differences in tonality between short and long exposures are subtle. One has to print a lot and study the results before seeing many of these subtle differences caused by this and other techniques!
Enjoy the Ride!