Ezekiel, as you've discovered, you've wandered into an area in which there's about as much consensus as politics and religion. The guys who said don't over-worry it were smack on. Here's a few of my own none-to-deep thoughts:
The rod: Your initial inkling was correct. You're going to want something with more durability than the hollow 3-piece deals that come with an inexpensive kit. Dewey's is certainly a nice choice. Bore guide's not a bad idea, either. Also a plus-one to your idea of pulling the barrel off and cleaning from the chamber end.
Bore Snake: Get at least one. An excellent time saver. Very nice even if you just use it before the ride home.
Jags: You can push patches with nearly anything, but take a look at Bore Tech's plastic jags with the flanges that compress, then expand. They really do give your patch (solvent, oil or dry) excellent contact down the length of the barrel.
https://www.boretech.com/products/shotgun-jag
Bore cleaner: The one place I do use WD-40, but with the barrel(s) off the gun. Cheap and effective and I don't have to make my own.
Solvents: Most work. I like either Hoppe's Elite Gun Cleaner Spray or MPro-7 Gun Cleaner 'cause they work, have very little or no smell and are non-toxic. Yep, touch on the expensive side, but I understand I'm paying for preference and convenience. I clean my guns in my home office/gun room (aka, the second bedroom of my two bedroom apartment), and I -- and the occasional significant other -- gotta put up with whatever I'm using.
Oils: Hoppe's regular (the traditional) is not bad at all, IMO. Get at least one of the little needle-oiler bottles from them. Precise application, little waste, cuts down on chances of over-oiling, and you can refill 'em from your orange bottle. In fact, needle oilers and their cousin, the grease syringe, are both good ideas. While I've read good things about Hoppe's synthetic oil, I haven't tried it. If you want a synthetic (for cold weather use, for instance) I like Shooter's Choice FP-10 Lubricant Elite or G-96 Synthetic Gun Oil. The former is less expensive, but it does have a bit of a smell. Of course, as I use it as a straight-up lube, I'm not using very much in any given single application.
CLPs: BreakFree is relatively inexpensive, works pretty well and can be had anywhere. Not bad stuff at all. Personally, I prefer G96 Complete Gun Treatment, but I again know I'm paying for preference. It's served me very well for quite a few years, and I like the non-offensive smell.
Ballistol: I've been a convert, then strayed. I'm back to G96 as my mainstay CLP. The one thing I still do like and use from Ballistol: The little 1.5 ounce aerosol cans. They're kind of the bee's knees for take-with cleaning kits and range bags.
Grease: Volumes have been written and insults exchanged, all among men with far greater minds than mine. Latest and greatest seems to be Mil-Comm Tw25b. Have to admit, I've tried it and I do like it, but it's pricey. Tetra seems almost as nice and is about half the price. When I want something tackier (for choke tubes, for instance), I use Shooter's Choice Synthetic All Weather High Tech Grease out of the syringe. Quite decent stuff at not too bad of price.
Brushes: Yep, you're going to want some of the double-ended nylon gun brushes. If you want save some bucks, there's a link below to a 20 pack. I'm using 'em now. They work.
Brass (really bronze phosphor): Yeah, you're going to want them, too. Link to a decent 10-pack below.
https://www.amazon.com/gp/product/B06XQ ... UTF8&psc=1
https://www.amazon.com/gp/product/B07BR ... UTF8&psc=1
Another brush tip: Get a decent shaving brush at the drug store or Wally or whatever. Great for touchin' up exterior metal, great for applying a light coat on interior metal, a knife blade, whatever. I keep one next to a G96 rag on my bench (OK, actually's it's just a white synthetic table from the office supply store). I usually spritz the rag, then run the brush over that.Keeps me from over-applying to the brush itself and thereby laying too heavy a coat on whatever I'm working on.
Q-tips and pipe cleaners: Yeah, you're going to want 'em. Re pipe cleaners, don't get the craft store or craft aisle variety. They're not very absorbent and they shed. Get the everyday or soft version (not the ones with abrasive wire bristles built in) from a brand like Dills. If you get 'em off Amazon and not from the local tobacconist, get a multiple-packet deal. Paying the shipping on a 36 pack of pipe cleaners is kind of squirrelly.
Rags/patches: Buy 'em or make your own. A tip (I believe Seamus here on this board shared it with me): Scotts Rags in a Box work really well. The heavier grade of blue paper shop towels on a roll ain't bad, either, but the Rags in a Box are even better.
Other doodads: Magnetic parts tray -- oh, yes. Magnetic pick-up, same, especially if you've got middle-aged eyes. A magnet has located many a tiny screw and such from the carpet when my peepers were not getting the job done.
Final thoughts: (A) These are pretty much my preferences or opinions. In other words, Your Mileage May Vary. (B) I'm as full of it as the next guy. (C) Someone will be along momentarily to explain Point B in greater detail.
Enjoy your new gun and don't sweat the small stuff. {hs#