Fly tying is a seemingly complex pursuit, yet at the beginning I suggest you keep it as rock bottom simple as possible. I say this because, like many pursuits in life, you most probably will dabble and drop.
Take a class. Most classes start in the early Fall. There are usually 3-5 classes for under 100. This will often show you if you really have an interest to continue. If so, buy a reasonable starter kit for under 100. If classes are not available at a nearby fly shop or community college then take the time to watch the countless You Tube videos and read sites, like here and from my blog roll, and get a sense of the techniques that are typically employed. Books abound re fly tying, but start with basic how to books.
I hope you would not succumb to walking into a shop or sporting goods store (sorry shops) and laying out a cool 1000.+ for a trout fishing set up with out a clue whether you will continue. I know shops love the customer of means that walks in and doesn’t blink plopping down such money. But, for the beginning fly fisher and for the beginning fly tier…start slow, buy reasonably priced gear to start and upgrade later if the passion is there. If you are so well healed that you can afford top of the line, then have at it.
Next, know thy self. In your pursuits, do you accumulate lots of stuff (me)? Or, are you more self contained and organized (not me). Plan for this. I have to strongly urge that you keep your fly tying (and fly fishing gear) organized. In the beginning it seems easy enough. But, diverse avenues of interest can spread you out before you know it…so, plan the organization of your materials and gear.
Lastly, plan a pleasant place to tie. I have tied on bread boards, kitchen counters, cold garages, damp basements, dining room and kitchen tables. Make it pleasant and have excellent lighting and a perfect back drop to avoid eye strain. Clean up after yourself after completing each pattern. Otherwise you will create that layered look of spey fly materials on top of stillwater patterns on top of ….'”now where did I put that dubbing?” Tie the basic patterns and master the techniques while creating worthy, productive patterns. Enjoy!