Try golf instead? If you really want to get into fly fishing, find somebody who fishes a lot and offer to drive, pay for gas, shuttle, or the beer. Row as much as they will let you and watch what they are doing.
I did this for 2 years when I was first getting started and I feel like I advanced much quicker than guys who go at it on their own.
Join a club and go on some of their outings. We forget how to seek advice and help from those who have done it before. Will take a bit to find a good mentor, as those dudes can be bastards! But they have the goods...
Using a fly rod is akin to a religious experience to me. Practice/fish at every opportunity. I have been at this since around the mid-fifties; even when a sore knee sidelines me on occasion, I'll still break out a rod & practice in the yard. Keep looking until you find a place you really like & enjoy; then keep at it to learn all you can about that water. Many of those lessons and all of your work with a fly rod to that point will pay dividends on "other" water. Be friendly & talk to folks you meet. My parents, aunts & uncles fly fished so I had built-in mentors, but I still took every opportunity to learn & share from & with others over the years. Tying my own flies & fishing them have become part & parcel of my enjoyment. Be ethical & have fun!
I took a continuing ed class on Introduction to fly fishing - it was 6 weeks i believe and included casting lessons, reading the water, knots, a bit about entomology and flies and because the instructor was a fun guy some pretty good fishing stories.
keep your eyes open when exploring new fishing holes and your whole universe may expand- that patch of chanterelles that no one but you will ever find, the black-cap patch you can bring the kids to, the drainage that has to have some big bucks in it. Even on no-fish days there's unquantifiable value in them thar hills...
Oh yeah, one more piece of newbie advice. DON’T fish the Yakima! I know it’s blue ribbon and has very large rainbow and yadayadayada. The Yakima for me is like a bad boyfriend. I know he’s bad, but i stick with him thinking he’s going to change and he never ever does. I hate that stingy river and i have finally broken up with it.