Fish an egg, like a Sucker Spawn or a Glo Bug in semi-natural colors to work on your drag-free drift--get the fly going at the same rate as the current. Stocked trout, especially those freshly stocked, will provide a wider margin of error in your drift so you'll get some degree of feedback and practice. Experiment with splitshot and dial in getting your fly down to where the fish are (generally speaking, trout not actively eating on top or eating emergers are a bottom third feeding fish in the water column).
If you want something a little more interactive, fish a Wooly Bugger, dead drift, fish it across and down, strip it back up, keep messing around until you find success.
It's been a very long time since I've fished Neshannock, but the above will work there and I'd listen to those telling you to fish the DHALO section...or go catch smallmouth, they're wild fish that aren't nearly as pressured, and honestly, more fun than stocked trout in my opinion.