I hadn't tied flies since I was a kid and went out and bought a kit. In hindsight, I wish I hadn't bothered. There's stuff in there I still don't know what to do with 2 years on
I now look at patterns either in magazines or on this very forum (there are some superb tiers on here) and make a list.
A kit assumes a wide variety of flies, whereas you may only fish rivers, so all that fritz would be pretty useless.
Celtic Fly Craft, Dave Downie, Anglers Lodge, Tackle and Tying, Spiderplus, Cookshill, Joel (tungsten beads uk) and WCB all get superb reviews.
Find some patterns, then find the materials