I think that you need to break it down into some smaller parts. There are a few important parts to fly fishing.

1. Understanding rivers, insects, flow rates, where fish sit etc. Do you know anything about this?

2. Casting. This is where most people get unstuck. You can pick up a beginner fly rod like one of these: https://flyfisherpro.com/gear/rods/b...inner-fly-rod/ Most of them are around $200 or so. Try to avoid the cheapest ones as they tend to snap.

Then just practice feeling the rod loading and then practice timing. In my experience new fly fishers tend to cast too quickly and don't let the rod load properly. Practice with some cheap line and a short leader (in an open field) with a little indicator on the end (no flys) till you get the hang of it.

3. Go to a local fly shop and ask them where a good beginner spot is to fish nearby and what flys the recommend. Buy 2 of each as you'll lose a lot!

4. Go to the river and try your luck but have low expectations as you'll likely not land anything for the first few outings, but when you do you'll be hooked forever! (pun intended)