Someone mentioned a dry-dropper rig earlier.

I agree. A Stimulator on top and a Prince below. Just tie a piece of tipper to the bend of the hook on the dry, with an improved clinch knot. (And don't ask me what an unimproved clinch knot is.)

The advantage to this is simplicity. You can do it with your standard mono materials. And you can switch out the nymph, or add/subtract the tippet length, without a lot of fuss.

After you've developed a feel for subsurface fishing, you can start fooling around with more complicated rigs.