The setup you are using sounds OK.
The most important thing is to be sure you are fishing a stream that has a significant number of trout in it.
That may sound sarcastic, but it isn't. When I was starting out I fished a lot of streams that I realize now, with more experience, that at the times of the year I was fishing there, the number of trout was extremely low, and approaching zero in some cases.
If you are in a stream that has trout, and you cast standard nymph patterns up and across in riffles and let it drift down into pockets and the heads of pools, you will start catching trout.
There is a ton of stuff to read about nymphing, but much of it is very complicated, about specialized rods and complicated leaders and techniques. And that can be confusing.
But at its basic level, nymphing is very simple. You can use a standard fly rod, and standard leader.
And just cast up and across, and drift the nymph down through good looking spots, and watch for takes. That's it.
You will pick up many tricks and techniques as you get more experience, but just doing that will catch plenty of trout.
It's just like fishing worms for trout. Cast up and across, drift it down through good looking spots, follow the drift with your rod tip, strike when you see any unusual movement in the line and leader.