Michiganman, welcome to the site!
Your question, and similar questions can often be answered with a little research. As an example a Google search for "Muskegon River Steelhead flies" produced several links to guides & flies as did "Great Lakes Steelhead flies". Like most things it's what you ask that gets the results. Hopefully someone here will be able to provide more detail too for your quest.
Even though I've never fished for Steelhead, I have tied quite a few flies for them. I tied commercially for many years & when asked, could often find enough info to provide flies for most any destination. I could usually figure out the pattern recipes, and sometimes would make whatever substitutions I thought would get a similar result. What's specified in most pattern recipes are not often critical as far as catching fish on them.
In many cases it may be a matter of sizes, and not as much about patterns for flies that may be productive for Steelhead (or any other fish). After all, they're simply a bigger trout. (Yes, I know it's not that simple, but bear with me!)
Since you're both new to fly fishing & tying, look around at patterns for Steelhead & whatever other fish you wish to chase and find yourself some simple patterns to tie. Progress to those that are more involved as you can afford the additional materials, but select the patterns first, then procure the materials. That will help keep your costs under control. Don't try to do it all at once, unless of course you can afford to go into this full tilt! Most can't, so take it a step at a time.
IMO, you'll want both bright & dark patterns, so keep that in mind.
Even though I've never fished for Steelhead or Salmon, I have fished with some of the patterns used for both. Trout will sometimes take them if the sizes are correct as will stream bass, especially Smallmouths. None of these fish know what our intended target may be when we tie the flies. They don't care what we call them or the label placed on them for the targeted species.
I learned a lot about tying various pattern types, even though I might not have reason to use them for their intended purpose, just by sitting down & tying those patterns. Did you know that Key's style Tarpon flies work great for LM bass? Yep, just as many Steelhead patterns work well for stream SM bass.
If you can tie some variety of patterns, even those that fairly mimic the flies you see online for Steelhead, and in appropriate sizes, and can get them in front of the fish, you stand a good chance for catching some of them. Don't get too wrapped up in patterns. ( Admittedly, I don't follow my own advice, because I like to tie a lot of variety!
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Fly patterns are only one part of the equation, and often it's a small part. You can have the best "patterns" but you still have to put them where the fish will take them.
I wish I could be specific with a pattern advice, but I can't recommend any. Once you find some patterns you wish to try out however, if you have tying questions, there's a wealth of knowledge here & many who will be more than happy to provide advice & direction.