The temptation is to start out tying a few of everything. Since you want to chase bass panfish and trout, you might want to think about patterns that will:
do double or triple duty for multiple species,
build up an inventory of stuff that can be used on a lot of other useful patterns that you’ll actually fish,
be cost effective in terms of bang for the buck (a losing battle for most of us),
be simple to tie
build on techniques and materials
You might want to consider patterns like
Olive and black woolly buggers (trout and bass)
size 8 3xl hooks 100 pack (these will be good for additional trout streamers, large nymphs and some dry flies like hopper patterns, foam stuff and stonefly/hopper patterns like Madame X)
Black Danvilles Flatwaxed Nylon (a strong thread good to start with, and will be usefuul for streamers and spinning deer hair later)
Olive and Black Chenille
Olive and Black Marabou “Blood” Feathers
Nontoxic “lead” wire .025 or .030"
Copper medium wire (you can use this for Brassies size 12-16)
Optional bead head 4.0mm or 5/32 (for size 8-10 size hooks)
Chartreuse over White Clouser (and all chart and all white) for bass
Size 6 4xlong hooks 50 pack (or standard size 2 SW hooks if you fish there too)
Chartreuse and White Danvilles Flatwaxed Nylon
Chartreuse and Natural (White) bucktail
Pearlescent Krystal Flash
Bead Chain (easier to cast) or lead dumbell eyes
Hares Ear Nymph and Flymph (soft hackle wet fly)
Size 12 Dry fly 100 pack for maximum versatility
Gold Ribbed Hares Ear
size 12 dry fly hooks 100 pack (normally calls for nymph hook, but will be a more versatile hook for now)
Black, brown, olive and tan 6/0 thread
Hares mask pick a natural one with a lot of different earth tone shades
Fine gold wire
.015" nontoxic “lead wire”
Starling skin (5 bucks as opposed to a partridge skin for 25) You can use this for the legs on the nymph (or just pick out he dubbing in the thorax), and it’s also great for soft hackled wets.
Bead head optional 3.2mm or 1/8 (for 12-14 size hooks)
Pheasant Tail Nymph
Size 16 dry fly hook 100 pack
Pheasant tail feathers
Peacock herl
Copper fine wire (also for small brassies)
Optional bead head 2.3 mm or 3/32 for (16-18 size hooks)
X caddis and Sparkle dun (very effective dry flies that don’t use dry fly hackle)
Size 14 dry fly hook 100 pack
12 color assortment of dry fly dubbing (Superfine or Fly Rite) about 15 bucks in a dubbing dispenser ( or just a pack of tan for 3.50)
Patches of Elk Hair, medium and “dark coastal” deer hair (aka comparadun hair) about 3.50 patch
Amber or light brown Antron or Z-lon for “tail” (shuck)
With the materials for these flies, you’ll have a ton of material to tie caddis and mayfly dries size 12-16, nymphs size 8 and 12-16, wet flies (flymphs, peacock and pheasant tail herl bodies) size 12-16, olive marabou bodied dragon fly nymph size 8 and 12, Brassies sizes 12-16 (with a wrap of peacock herl or fluff of marabou as “dubbing”) for the head.
And with addition of a few inexpensive materials bucktail streamers and marabou streamers size 6 and 8 (pearl, gold, and/or silver tinsel or body braid), emergers and snow shoe or CDC dries 12-16 (snow shoe hare’s foot or CDC and add size 18 and 20 dry fly hooks if you need small stuff), and Madame X size 8 and 6 (rubber legs and yellow poly yarn), and some poly winged spinners (white antron or poly) and a variety of midges, and some edgefoam or cork popper heads for bass and panfish (may require special hooks depending on what you get).
At some point you’ll want to add a ton of other stuff and more specialized hooks, but this will keep you busy for awhile and will build up a pretty useful box for all kinds of stuff. For dry fly hackle, grizzly would be a good first choice, followed by brown, Medium Dun and Light Ginger (or Cream). You can cover a lot of bases using them alone or in combination. Grade 3 capes for a good range of sizes from Conranch, or a Pro Grade Whiting Hebert Miner cape from Hook and Hackle, or a grade 3 Cape and free saddle from Collins Hackle would all be good choices (to tie down to size 18 or so) for under 30 bucks a pop.
You can find great step by steps in the FAOL fly archives for all these patterns. Good luck,
mark