It’s been ~ 20 years since I lived in Colorado but I had great luck fly fishing in rivers and using spinners and such with casting rods. “Western fishing” isn’t really that complicated, go to a fishing shop and they usually have charts on the wall with updates of local areas. Go check out places, fish, when you catch something….do the exact same thing again.
Fishing is pretty simple, lots of fun when you start catching fish everywhere you go.