Not having done much nymphing, my question is about intermediate or full sink line fishing with an indicator. How is this accomplished? Does one tie the indicator onto the fly line itself?

Or are sink-tip or full sinking lines mostly used for swinging flies?

I would really like to start nypmhing more often, I feel like I am missing somthing. I just am not all that good at it...

Nope...Can't afford lessons.

also not trying to start the old bobber vs. not argument. I actually us a tiny red and white bobber to nymph, and I think I understand the swinging wets/nymphs idea.