I hope to move someday close to a river or stream so I can pick the hobby back up. Used to tie my own as well, I highly recommend Trout Flies: The Tier's Reference [1]. Full color, step-by-step instructions, so enjoyable to flip through I still pick it up sometimes even though I don't fish anymore.

[1] https://www.amazon.com/Trout-Flies-Reference-Dave-Hughes/dp/...