Street...
usually local fly shops have some general classes for beginners (they obviously want new clients)
Since you are in an area that supports fly fishing streams, I'd suggest that you observe some fishermen while casting; some might be able to give you hints/suggestions if you ask.
{I was previously just a short jaunt (8 minute) from the Deschutes in central OR, true nationally recognized fly fishing (the trout raised there get sent all over the country). I had also been in CO and done mountain stream and small lake fishing there }
The classes should have you recognize different flies for the different hatching seasons of the food sources, the type of lines that could be used in different conditions, casting techniques for both downriver and side casts, ....and lots more.
Those of us who also started tying our own flies..., well, yeah, it can get a bit much...but you don't have to go overboard... but it takes a lot of time (and lots of repetition of different flies) to get anywhere near proficient. It's nice though when a brownie takes the fly you tied yourself; I really can't tie anything smaller than a 16 (hands too big... and had issues, since resolved with carpel tunnel surgery)... I'd suggest starting with 12's and 14's for technique (wrapping, how to add the feathers, whipfinishing, etc) and to be able to develop patterns that might work for the conditions.
(...and no, I didn't get/have the expensive rods.... mine were older "hand-me-downs" that I had to repair to get into condition. I did get some good waders... truely needed in many areas to get into the good spots. )
One thing- - in our area, we also had to be aware of wildlife- - mountain lions often were in the area and were sometimes spotted observing fishermen (saw evidence of kills and knew to stay alert !) (we didn't have bears where I went (which were remote) but farther into the wilderness and BLM areas they did occur...** so be safe **)