Nick, I wish you the best of luck. I've tried with indicators such as palsas, thingamabobbers, and the lightening football shaped twist-ons. I've also used the teardrop shaped/toothpick indicators. No matter what, I've always found nymphing to be a difficult activity for me to master. Maybe I don't notice the changes, or notice in time. Maybe I don't use enough weight to get down quick enough. Either way, I usually stick to streamers and topwater these days.
None of this is meant to dissuade you, it's just my experience. I would recommend finding someone to go nymphing with and observe/learn from them in person. Might be easier. I've done plenty of observing, but still looking for the time and person to go with who can enrich my experience personally.